Soundless Generator

M a l i e

D C A - 4 5 M Z

D C A - 2 5 M Z

Astonishingly quiet

To the Next of "Ultrasilent"
The sound level of the silent generator Mālie* is only 43 to 44 dB.
It is said to be as quiet as the sound in a library.
In recent years, consideration for sound and noise has been required,such as in residential areas, hospitals, and near schools.
Denyo has been continuing to challenge the development of quieter generators even by 1 dB.
The silent generator Mālie, which is completed with our original soundproof design technology
and many years of expertise, is even quieter than the ultra-low noise typeand super ultra-low noise type. Denyo's technology has evolved by one step again.
* M ā l i e me a n s qu iet a nd c a l m i n H aw a i i a n .

DCA-45MZ

DC A-25MZ

Soundless Generator Malie

Astonishingly quiet［The sound level comparison of 25kVA class］
Noisy

90dB

Construction Site(90dB)

80dB

In a train(80dB)

70dB
60dB
50dB

※

Washing Machine(60dB)

51dB

Sound Proof Type43dB※

DCA-25ESKQuiet Office(50dB)

※

40dB
Quiet

Noisy street (70dB)

60dB

Ultra Sound Proof TypeSoundless Type Mālie

DCA-25USIE

30dB

Library(40dB)
Midnight in suburbs(30dB)

DCA-25MZ［The sound level comparison of 45kVA class］
Noisy

90dB

Construction Site(90dB)

80dB

In a train(80dB)

70dB

Noisy street (70dB)

60dB

Quiet

30dB

50dB

※

50dB
40dB

Washing Machine(60dB)

55dB

44dB

※

Sound Proof Type

DCA-45ESI※

Ultra Sound Proof Type

DCA-45USKE
Soundless Type Mālie

Quiet Office(50dB)
Library(40dB)
Midnight in suburbs(30dB)

DCA-45MZ*Sound level reﬂects high-speed no-load operation and is calculated by averaging the measurements at four points, each 7 meters from the source.

Three Points That Achieved Overwhelming Quietness■ Point1. Reduction of Noise Generated from the Engine
The engine fan, which is the number one cause of the engine noise, has been replaced with two electric fans.
In addition, the engine sound is minimized with the installation of a dual pipe muf ﬂer (DCA-25MZ) or a muf ﬂer one
class larger (DCA-45MZ).

■ Point2. Reduction of Vibration Generated from the Engine
Vibration generated by the engine is also a major cause of noise. Therefore, the noise from the engine is reduced byreviewing the vibration-proof material and suppressing the vibration from the engine as much as possible with theoriginal structure ,such as the vibration-proof support (DCA-25MZ) for the muf ﬂe.

■ Point3. Structure not to leak noise of the generator to the outside as much as possible
The structure of the hood has been completely reviewed, and the engine is surrounded by a frame and covered with acover from above to create a double structure that prevents noise generated by the engine generator from leaking
out as much as possible.

Equipped with High Performance Generator
Power Generators with Less Waveform Distortion and Voltage Fluctuation
With their intensiﬁed damper wiring, our generators are less vulnerable to waveform distor tion, even when the load
applied to the rectiﬁers changes. They are also highly resistant to negative-sequence current. Moreover,since they can restric t voltage ﬂuc tuation, they can resist inver tor load, thyristor load, and computer control load.
They are suitable for lighting at event sites, precision apparatuses, and measurement equipment.

Generators with better Motor Activation
The transient reactance of our generators is low, and with the introduction of original excitation systems, their motor
activation per formance is bet ter. Moreover, since our generators can reduce instantaneous voltage drops and canrestore voltage in a shor t period of time, they have lit tle ef fec t on the other elec tric equipment when star ting up
devices sequentially.

Operability
Operation switches and meters are arranged functionally, and a one-panel system has been adopted so thatthe equipment is easy to understand and operate even for people who are unfamiliar with it. Every generator is also
equipped with a high-visibility digital engine monitor as a standard.
The control panel switches are arranged in accordance with operation procedures, and each switch has a number,so that anybody can switch them on and of f safely and without error.

⑤ ⑥ ⑧ ⑦ ⑫ ⑨ ⑩⑬① Indicator⑩ Voltmeter

Engine Speed,Oil Press.,Water Temp.,Battery①② Fuel Level Indicator⑪ Earth Leakage Relay③ Warning Lamp

⑫ Output Voltage Indication Lamp

Oil Pressure,Water Temperature,Air Filter,Over Speed

②③④⑱

⑰⑯⑭

⑪⑮

④ Hour Meter⑬ Circuit Breaker(1-Phase,3-Phase)⑤ Frequency Meter⑭ Emergency Stop Button⑥ Panel Light Switch⑮ Voltage Regulator⑦ Panel Light⑯ Starter Switch⑧ AC Ammeter⑰ Speed Change Over Switch⑨ Pilot Lamp

⑱ Frequency Change Over Switch

Photo：DCA-45MZ

Maintenance
DCA-25MZ is equipped with a sliding door.

DCA-45MZ is equipped with a double door.

The opening area can bewidened while reducing
the maintenance space.

Since it is a double-sideddoor, workability during
maintenance isoutstanding.

The structure makes it easy toclean the radiator.
The front portion of the front panel can be opened andclosed widely simply by removing two bolts, making it
easy to clean the radiator.
DCA-25MZ

DCA-45MZ

Soundless Generator Malie

Safety Device
Earth Leakage Relay

Automatic Safety Controls

To prevent electric shock, it is recommended thatthese generators are equipped with earth leakage
relays and circuit breakers.

The generating set shall be equipped with
automatic safety controls which shuts down theengine in the event of abnormal conditions
mentioned below.
Engine shut down
will trip

Circuit breaker

Alarm lamp

Low lubricating oil pressure○−○

High jacket water temp.

−−○

Over current of generator−○−Earth leakage

−

○

○

Fuel level failure

−

−

○

Air element blinding

−

−

○

Over speed

○

−

−

Mark ○ ; Operate Mark − ; Not operate

Eco friendly devices
ECO-BASE Body

Water & Oil Separating Structure

ECO-BASE is a base which has an oil receiverinstalled inside. You do not need to put an extra
tray on the bottom of generator. It is designed toreceive fuel, oil and coolant water when they aredischarged accidentally.

ECO-BASE is designed to separate water and oil.
Water will be discharge ﬁrst when oil before
ECO-BASE is ﬁlled to maximum.

OIL

WATER
Eco Base

Easy to Drain

Simple Fluid Level Indicator

Quick and Easy Detachment

Water and oil collected in ECO
tank drains easily through large
caliber drain valve.Swivel-typeoil drain increases the speed ofdraining compared toconventional type.

Fluid Level Warning Lamp
gauges the level of ﬂuid inside
the ECO-BASE.It lights up
immediately when ﬂuid reaches
50% capacity

ECO-BASE can be easily
detached by removing all bolts.
It is extremely easy to clean andmaintain.

Large Caliber

Fluid Level Warning Lamp

Swivel-type Oil Drain

SPECIFICATION TABLE
MODEL

DCA-25MZ

DCA-45MZ

AC Generator
Frequency

Hz506050

OutputRatingkVA

Continuous

2025

3745

Standby

21

26.3

40.7

49.5

190-220（380-440）

200-240（380-480）

190-220（380-440）

200-240（380-480）

No. of Phases
Rated Voltage

60

3-Phase,4-WireV0.8（Lagging）

Power Factor
Voltage Regulation

Within ±0.5%

Brushless ,rotating exciter（With A.V.R）

Excitation
Isulation

Class FClass H

ModelIsuzu
BV-4LE2

Kubota
V3800-DI-T-K3A

TypeInlined,
Direct Injected

Direct Injected,
Turbocharged, cooled EGR

EngineOutput Rating

Ps/rpm26/1500

31/1800

53.3/1500

62.7/1800

kW/min -1

19.1/1500

22.9/1800

39.2/1500

46.1/1800

No.of Cylinders-Bore×Stroke
Piston Displacementmm

L

4-85×96

4-100×120

2.179

3.769

Fuel

ASTM No. 2 Diesel Fuel or Equivalent

Fuel Consumption* 2
Coolant Capacity

3.2L/hLube Oil Sump Capacity

6.6

8.2
13.2

9.5

12.180D26R×1

115D31R×180

170

Length mm

1750

2200

Widthmm

1000

1200

Heightmm

1220

1490

920

1530

L

Battery×Quantity
Fuel Tank Capacity

4.2
8.7

LLUNITDimensions
Dry Weightkg

Sound Power Level
7m dB(A) 1500/1800rpm(min-1)* 3

43474449*1 Depending on location and area,output voltage may diﬀer from values listed in catalog.
( ) indicates option*2 Fuel consumption is based on operation at 75% load.
*3 Sound level reﬂects high-speed no-load operation and is calculated by averaging the measurements at four points, each 7 meters from the source.

ISO 9001：2015
ISO 14001：2015

Certiﬁed

The Denyo trademark is widely recognized as a brand, and is a registered trademark in 93 countries
and 8 regions.

Direct inquiries to the nearest Denyo distributor or Denyo co.,Ltd

FG09-01-20210119-03

Prited in Japan