§ Generator Digital CONTROLLER §Automatic Generator Controller

AGC-300

AGC-300(144×144×109.5mm/approx.1.0kg)■ USE
This product is multi-function generator controller to control synchronizing, load
distribution, constant power factor, constant voltage, constant frequency and operating unit
number in parallel operation between commercial and generator and between generators.
This product can be used for wide range, such as normal power generation and emergency
power generation, congeneration, etc.

■ FEATURES► Small-sized thin type, panel mounting controller (DIN144×144).
► Generator operating unit number is up to 8 units.
It is most suitable for system which is possible for expansion (1 unit for each).
► Stable operation in line with system can be realized with easy setting/switching ofoperational requirements (Setting of start, separation and switching of day/night are
possible).
► Safe controller with synchronizing check relay to consider incoming reverse power
prevention and generator overload prevention.

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1§ Generator Digital CONTROLLER §Automatic Generator Controller

AGC-300■ STANDARD SPECIFICATION
Parallel operation of incoming andgenerator
1

OperatingmethodSingle operation (generator only)

2
3
4

5

6

Generator
3-phase inputBus
voltage input

Measures voltage, current, frequency,
power, reactive power, power factor.

AC110V 5A 3φ

Measures voltage and frequency.

AC110V 1φ

DC input

Measures incoming power (T/D input)

DC4-20mA (approx. 50Ω)/0-200W(AC110V 5A 50/60Hz)

Input forcontrol(8 circuits)

Control output(10 circuits)

7

Communication

8

Control
power

9

SW
input

Control start
Incoming start
Synchronizing start
Distribution startCut-in start
Forced separation
Designation of preceding generator
Control changeover
Governor increase signal (65R)
Governor decrease signal (65L)
AVR increase signal (90R)
AVR decrease signal (90L)Start command signal
Separation command signal
Light fault
Closing command (25)Synchronizing check signal
Alarm
Communication among controllers

Power supply of controller
Address
Setting value input/measuring display
Setting value registration
Digit shift
Setting value increase
Display changeover
Function changeover (ALS/APFR/ALS+APFR)
Generator heavy load (ON/OFF)
Incoming control changeover (mode 1/mode 2)
Generator control changeover (mode 1/mode 2)
Closing direction changeover(FAST/FREE/SLOW)
Setting change (ON/OFF)
Item code
Measuring /setting data

10

Display

Phase difference display
State display

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Products List

Incoming constant , generator
proportional distribution , unit number
control/generator power factor constantGenerator proportional distribution,
rated frequency control, unit number
control/reactive power distribution,
rated voltage control
50/60Hz each 0.5VA

50/60Hz 0.5VA

Voltage input : DC24V(operating current: 10mA)

1a contact photo MOS relay output
MAX. DC24V, 90mA

1a contact photo MOS relay output
MAX. DC24V, 100mA or DC110V, 50mA
RS-485AC100/110V (85-127V) 50/60Hz 10VA
and DC110V (80-143V) 9W or
DC24V (20-28V) 9W. (Specify)
Digital switch

Push switch

Slide switch

2 digits 7 segments display (orange)
2 digits 7 segments display (orange),
LED×2 (orange)
LED×24 (yellow), LED×1 (green)
LED×10 (green), LED×1 (yellow),
LED×2 (red)2§ Generator Digital CONTROLLER §Automatic Generator Controller

AGC-300■ PERFORMANCE
Item
Synchronizing

Voltage difference
Frequency difference
Measured phase difference
Closing phase differencePower detection

Tolerance

Distribution
controlCommonPower factor detection
Reactive power detection
Current detection
Frequency detection
Voltage detection
Pulse width
Control delay time
AC input

Excess voltage
strength

AC power
DC power

Excess current
strength

Strength

Insulation
resistanceAC input
DC input

30MΩ or more at
DC 500Vmegger

AC2000V 50/60Hz 1min.
Withstand voltage
AC500V 50/60Hz 1min.
Impulse withstandvoltage

5kV 1.2/50μS

Vibration

False operation

Impactdurability

Operating temperature/humidity range
Storage temperature range
Exterior color/mass

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specification±0.5%±0.03Hz±1°±5°±1.0% % against rated power( at 1/2 to F/S of T/D full scale)±3°(when load current is 10% or more,
power factor is LEAD0.5-1-LAG0.5)±1.0% % against rated reactive power±1.0% % against rated current±0.1% % against rated frequency±1.0% % against rated voltage±10%±0.1s % against setting value±10%±0.1s % against setting value
2 times (10sec.) of rated voltage
1.2 times continuation
1.5 times (10sec.) of rated voltage
1.2 times continuation
1.5 times (10sec.) of rated voltage
1.3 times continuation
40 times (1sec.) of rated current
1.2 times continuation
2 times (10sec.) of rated current
1.2 times continuation
Between electric circuit and outer case(earth); between each other of bus voltage
input, generator voltage input, generator
current input, power input, for-control
input, T/D input, for-control output,
governor control output, voltage control
output and communication line.
Between electric circuit and outer case(earth); between each other of bus voltage
input, generator voltage input, generator
current input, power input, DC input,
for-control input and communication line.
Governor control output, AVR control
output and other control output
Between electric circuit and outer case(earth) 5kV 12/50μS
16.7Hz, peak-to-peak 1mm,
10mins for X.Y.Z direction each
294m/S2 (30G),
3 times for X.Y.Z direction each-10−+55℃,
30−85%RH (no condensation)-25−70℃
Munsell N1.5(black), approx. 1.3kg.

3§ Generator Digital CONTROLLER §Automatic Generator Controller

AGC-300

Control connection diagram of incoming and multiple generators (reference drawing)〜■ CONFIGURATION DIAGRAM OF INPUT/OUTPUT*COM2-COM4 is minus common

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4§ Generator Digital CONTROLLER §Automatic Generator Controller

AGC-300■ CONTROL FUNCTION► Synchronizing control
1.

2.
3.

Synchronizing control starts with synchronizing start input after establishing voltage and frequency
of generator. LED bar of phase angle validation is ON in compliance with phase difference.
(▽ marking in center is synchronizing point.)
When voltage is within ±ΔV and frequency is within ±ΔF, 25 closing command is outputted before
progress time from synchronous point after control. Contact ON time is progress time ±200ms
When phase difference exceeds 10゜or progress time +200ms with synchronous point being passed inspite of 25 closing command output, 25 closing command can be OFF. Reset of alarm is executed bystart signal being OFF.

Example of synchronizing success► Distribution control
Power distribution control/rated frequency control/generator power factor constant control/reactive
power distribution control/rated voltage control are selected by each start input.

(1) Power distribution (start/separation requirement is included)
Heavy load OFF: incoming constant control priority mode
Heavy load ON: generator heavy load operation priority mode

Incoming + Generator①incoming constant value=WMI②power distribution (proportional distribution)
Load for each generator =Total load – WMI
Generator rated total③startCommon: When total load exceeds WHI and continues for
TS sec. continuously, 1st generator starts to operate.
Heavy load OFF: Following generator starts to operate whentotal load exceeds WMI+WHG × operating generator
unit number (no timer)
Heavy load ON: Following generator starts to operate whentotal load exceeds WHI+WHG × operating generator
unit number and continues for TS sec.

④separation
Heavy load OFF: Last generator separates when total load
is below WMI+WMG × remaining generator unit
number and continues for TB sec. after separation.
Heavy Load ON: Last generator separates when total load is
below (WHI-△M)+WMG × remaining generator unit
number after separation.
Common: Last generator separates when total load is below
WHI-△M and continues for TB sec.

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Generator only
①incoming constant =0,
incoming measured value = 0②power distribution (proportional distribution)
Load for each generator =Total load
Generator rated total③start (heavy load ON/OFF common)
Following generator starts to operate when total load exceeds(WHG–△H) × operating generator unit number (no timer).

④separation (heavy load ON/OFF common)
Last generator separates when total load is below (WMG-△H)
× remaining generator unit number and continues for TB sec. after
separation.

5§ Generator Digital CONTROLLER §Automatic Generator Controller(2) Rated frequency constant
Incoming + Generator−(3) Power factor constant
Incoming + Generator①Generator power factor iscontrolled to be constant value(power factor is calculated by kW
and kvar)(4) Rated voltage constant
Incoming + Generator−

AGC-300

Generator only
①Rated frequency control is executed on all unites almost
simultaneously after power distribution
Generator only
①Reactive power distribution (proportional distribution)
Each generator
reactive power load =Total reactive power
Generator rated reactive power total

Generator onlyRated voltage control is executed on all units almost
simultaneously after reactive power distribution.

► Unit number control①Start command output
When total load exceeds pre-calculated start power, start command is outputted togenerator during standby.
②Separation control
When total load gets below the pre-calculated separation power, last generator of operation
sequence can be separated and controlled.
③Separation command output
When generator load during separation control reaches separation power (WLG),
separation command is outputted.
④Cut-in start
Any generator can start to operate regardless of load condition of other generator/starting
sequence by cut-in start designation.
⑤Forced separation
Separation of any generator regardless of separation sequence is possible by forced
separation command. When there is stand-by generator, separation is possible after start.
When there is no stand-by generator, separation is possible (only at parallel operation withincoming).

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6§ Generator Digital CONTROLLER §Automatic Generator Controller

AGC-300■ OTHER FUNCTIONS①Synchronizing check function (synchronizing control)
When phase difference between bus and closing generator is within 15゜ in ΔF/ΔV,
synchronizing check relay signal is outputted.
②Phase difference delay detection function (synchronizing control)
Frequency difference (0.05 or less) between bus and closing generator and phase difference
becomes almost constant; governor pulse is outputted 3 sec. later in order to speed up
synchronizing control.
・ When closing direction is FAST or FREE, governor increase signal is outputted.
・ When closing direction is SLOW, governor decrease signal is outputted.
③Mean value measuring control (power distribution control)
Incoming power can be measured and controlled in mean value by setting mean time TAI
second.
④Incoming reverse power prevention control (power distribution control)
When incoming is below min. power value (WLI), output decrease command (65L max.
pulse output) is outputted to all generators. When reverse power continues, error display/light fault are outputted.
⑤Power factor neutral zone changeover current value (generator power factor constant control)
When power factor neutral zone changeover current value (CHA) is below the load current,
power factor neutral zone is Δφ.
When power factor neutral zone changeover current value (CHA) exceeds the load current,
power factor neutral zone is Δφ×2.
⑥Power factor control cut current value (generator power factor constant control)
When generator load current is below the power factor control cut current value (CTA),
power factor control is stopped.
⑦Governor abnormality detection/AVR abnormality detection (distribution control)
When generator does not reach the target value even though governor signal (65R/65L) or
voltage signal (90R/90L) are outputted 60 times in same detection, error display/light fault
are outputted as governor abnormality/AVR abnormality. Control continues even thougherror is detected.

■ PULSE OUTPUT WAVEFORM(1) Full continuity pulse deviation is setting
value at power control. No relation with othercontrol.

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Products List

7

§ Generator Digital CONTROLLER §Automatic Generator Controller

AGC-300■ DISPLAY & SETTING②Control state display①State display of equipment

ΔV: ON when voltage difference is within closing permissible

Power supply: ON when control power is applied.

voltage differences at synchronizing control. ON when rated

During control: ON when control start input is applied.
Error: ON when input range error occurs.

voltage is within dead band at distribution control.
ΔF: ON when frequency difference is within closing permissible
frequency at synchronizing control. ON when rated frequency is
within dead band at distribution control.
ΔWI: ON when incoming power is within dead band.
ΔWG: ON when generator power distribution is within dead band.
Δφ: ON when phase difference is within 15°(synchronizing
check) at synchronizing control. ON within dead band at power
factor control.

③Measuring data/setting data display
Measuring mode/setting mode can be changed over withmeasuring /setting key. Item code no. and data for each mode aredisplayed.

④Synchronizing detection (phase difference) display
When ▼in center is phase difference 0°, SLOW in left direction
and FAST in right direction. LED is ON in 15° interval of phasedifference.

⑤Output state display
25: ON at 25 closing signal output.
Light fault: On when light fault (A/D error, setting valueerror. communication error, input designation miss) occurs.
Alarm: On when alarm (memory error/synchronizing error,etc.) occurs.

⑪Address changeover switch
Setting of equipment address.

⑥Changeover and measuring/setting data-change
Switch for display changeover of measuring data/display changeover orsetting data and setting value change. Can be executed by 5 key switches(refer to instruction manual.)⑦Function changeover switch
Setting of distribution control function.
ALS: Power distribution control.
APFR: Generator power factor control.
ALS+APFR: Power distribution and generator power factor control.

⑧Heavy load changeover switch
ON/OFF setting of generator heavy load control.

⑨Control changeover switch (3 items)
Setting of control when control changeover input is applied.
・ Incoming mode changeover switch
mode 1: setting value ① no changeover ; mode 2: changeover control (setting value ①→②)
・ Generator mode changeover switch
mode 1: setting value ① no changeover ; mode 2: changeover control (setting value ①→② )・ Closing direction changeover switch, changeover of synchronizing direction.
FAST: random closing → FAST closing
FREE: FAST closing → SLOW closing
SLOW: random closing → SLOW closing⑩Setting changeover switch
Setting change is possible (ON); setting change is not possible (OFF).

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8§ Generator Digital CONTROLLER §Automatic Generator Controller

21
22
23
24
25

Synchronous closing control

20

Setting description

Closing permissible voltage
difference
Voltage control pulse
Closing permissible frequency
difference
Governor control pulse width
Voltage pulse output
Circuit breaker progress time

Sign

ΔV

5%

Possiblesetting range

1-10%

Synchronizing control

No.

Initialvalue○

Parallelw/incoming

AGC-300

Generator
only

Power

Power

distribution

distribution

control +control +generator

frequency,

power factor

voltagecontrol

control

×

×

VPW

0.5S

0.1-1.0S

○

×

×

ΔF

0.1Hz

0.1-0.3Hz

○

×

×

FPW
PI1
25

0.5S
2S
50mS

0.1-1.0S
1-5S
10-310mS

○
○
○

×
×
×

×
×
×

○

×

×

Note

Setting value of synchronizing control;
setting is possible regardless of othercontrol.

26

Closing output continuation
frequency

25N

1 time0: no limit
1: 1 time
2: 2 times
3: 3 times

27

Incoming power transducer full scale

WFSI

1200kW

10-9999kW

×○×

Setting value of incoming T/D input
sensitivity. Setting is required forparallel w/incoming
Setting is possible as required.

TAI

2S

0-120S

×

○

×

29
30
31

Incoming power measuring meantime
VT ratio of generator 3-phase input
CT ratio of generator 3-phase input
Bus rated voltage (VT secondary)

VT
CT
V

60
50
110V

○
○
○

○
○
○

○
○
○

32

Bus rated frequency

F

50Hz

○

○

○

33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54

Incoming max. power

WRI
WHI①
WHI②
WMI①
WMI②
WLI①
WLI②
ΔM①
ΔM②
ΔWI①
ΔWI②
THW
TLW
ΔFC
THF
WRG①
WRG②
WHG①
WHG②
WMG①
WMG②
WLG

600kW

1-99991-999990-120V
49.0-51.0Hz
59.0-61.0Hz
10-WFSI

×

○

×

90%

20-95%

×

○

×

50%

10-87%

×

○

×

20%

1-50%

×

○

×

10%

5-70%

×

○

×

10%

3-30%

×

○

×

3.0S
0.3S
1.0%
3.0S

0.5-5.0S
0.1-1.0S
0.2-5.0%
0.5-5.0S

×
×
×
×

○
○
×
×

○
○
○
○

×

○

○

28

55
56
57

Generator start power
Incoming constant control power
Incoming min. power
Generator separation possible
deviation
Incoming power dead band
Power control max. pulse timePower control min. pulse time
Frequency control dead band
Frequency control max. pulse time
Generator rated power (generator
max. operation power)
Following unit start power
Generator separation possible power
Generator min. power( at generator only connection)
Following unit start deviation &separation possible deviation.
Generator power dead band

1500kW

10 - (VT×CT)kW
MAX.9999kW

100%

70-100%

×

○

○

80%

50-95%

×

○

○

10%

1-40%

×

○

○

ΔH

20%

1-40%

×

×

○

ΔWG①
ΔWG②

2%

1-30%

×

○

○

THQ

3.0S

0.5-5.0S

×○○

Setting of VT/CT of generator.
Setting of rated voltage and rated
frequency of bus.

Setting item regarding incoming power
constant control.
There is following limit except possible
setting range mentioned in the left: WHI–ΔM –ΔWI ≧ WMI ≧ WLI +ΔWI
% against WRI

Setting of control speed.
Setting item of frequency control at
generator only operation.

Setting item of following unit start
power and separation possible power.
There is following limit except possible
setting range mentioned in the left:
WHG –ΔWG ≧ WMG% against WRG

TLQ

0.3S

0.1-1.0S

×

○

○

60
61

Reactive power control max. pulse
time
Reactive power control min. pulse
time
Voltage control dead band
Voltage control max. pulse time

ΔVC
THV

2.0%
3.0S

0.5-5.0%
0.5-5.0S

×
×

×
×

○
○

Setting item of voltage control at
generator operation only.

62

Generator rated reactive power

QRG

750kvar×○○

Setting value
reactive power.

58
59

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Setting of control speed

50 - (VT×CT)kvar
MAX.9999kvar

ofgenerator

9

rated

§ Generator Digital CONTROLLER §Automatic Generator Controller
Setting description

69
70

Generator constant control power
factor value
Power factor control dead band
Power factor control dead bandchangeover current value
Power factor control cut current
value
Generator following unit startdetection timer
Generator separation possible
detection timer
Governor control delay time
AVR control delay time

71

Incoming max. pulse power deviation

63
64
65
66
67
68

72
73

Generator full continuity pulse power
deviation
Generator max. pulse power
deviation

Initial
value

Sign

Power

Power

distribution

distribution

control +control +generator

frequency,

power factor

voltagecontrol

control

Note

cosφ

LAG90%

Δφ

3°

CHA

30%

10-60%

×

○

×

CTA

10%

1-10%

×

○

×

TS

60S

0-120S

×

○

×

TB

30S

0-60S

×

○

○

TGDL
TADL

2S
2S

×
×

○
○

○
○

ΔWTHI

50%

0-20S
0-20S
50% fixed
value

-

-

-

ΔWTRG

50%

10-70%

×

○

○

ΔWTHG

30%

10-50%

×

○

○

-

-

-

-

-

-

-

-

-

○

○

○

Setting of with or without governor
abnormality detection.

○

○

○

Setting of generator operation unit no.

○

○

○

7 segment LED is OFF.

×

○

×

×

○

×

Setting item at generator power factor
control.

Timer setting.

Max. pulse frequency deviation

ΔFTH

10%

75

Max. pulse power factor deviation

ΔφTH

60°

76

Max. pulse voltage deviation

ΔVTH

10%

77

Governor abnormality detection

GAV

1

78

Generator parallel operation unit no.

Parallelunit no.

1 unitDisplay automatic OFF time

AGC-300

Generator
only

LEAD95-100LAG70%
2-10°

74

79

Possiblesetting range

Synchronizing control

No.

Parallelw/incoming

TDSP

10 min.

10% fixed
value
60°fixed
value
10% fixed
value
1: ON
2: OFF
1-8 units
1-10 min.
0: continuation

Setting of control speed.

●Display item list
No.
01
02
03
04
05
06
07

Display description
Bus voltage
Bus frequency
Incoming power
Generator voltage
Generator current
Generator power
Generator reactive power

Unit
V
Hz
kW
V
A
kW
kvar

No.
08
09
10
11
12
13

Display description
Generator power factor
Generator frequency
Voltage difference
Frequency difference
Incoming mean power
Equipment address

Unit
%
Hz
%
Hz
kW
-

■ TERMINAL ARRANGEMENT DRAWING
No.
1
2
3
4
5
6
7
8
9
10
11

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Input terminal
Bus voltage input (P1)
Bus voltage input (P2)Generator voltage input (P1)
Generator voltage input (P2)Generator voltage input (P3)Generator current input (1S)
Generator current input (1L)
Generator current input (3S)
Generator current input (3L)
Incoming power T/D input (+ )Incoming power T/D input (−)

No.
12
13
14
15
16
17
18
19
20
21
22

DO/communication/power supply terminal
25 closing command
Synchronizing check
COM5
alarm
TRXP, TRXN, TRXT, communication among
control equipments
Control power (+ )Control power (− )
F.G.

10

§ Generator Digital CONTROLLER §Automatic Generator Controller

AGC-300■ CONNECTOR ARRANGEMENT DRAWING
DI/DO terminal
NC
Control start
Incoming start
Synchronizing start
Distribution startCut-in start
Forced separation
Preceding generator designation
Control changeover
COM1
NC
NC
NC
NC
Start command
Separation command
Light fault
COM2
AVR increase
AVR decrease
COM3
Governor increase
Governor decrease
COM4
NC

No.
50
48
46
44
42
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2

No.
DI/DO terminal
49
NC
47
Control start
45
Incoming start
43
Synchronizing start
41
Distribution start39
Cut-in start
37
Forced separation
35
Preceding generator designation
33
Control changeover
31
COM1
29
NC
27
NC
25
NC
23
NC
21
Start command
19
Separation command
17
Light fault
15
COM2
13
AVR increase
11
AVR decrease
9COM3
7
Governor increase
HIF3 BA-50PA-2.5DS
5Governor decrease(Hirose)
3
COM4
1
NC
Conformity connector: HIF3 BA-50D-2.54C
HIF3 BA-50D-2.54R

DI

DO■ DIMENSIONS

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11