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CZM9

ATS (PC-Class)

CZM9 series automatic transfer switch is suitable for AC 50/60Hz power systems with rated voltage AC400V and current up to 800A.It enables automatic switching between two power sources to ensure uninterrupted power supply. In case of overvoltage, undervoltage, or phase loss, it switches to the backup source or starts the generator.

Equipped with RS485 interface and MODBUS-RTU protocol, it supports real-time data upload, remote monitoring, and control.

Widely used in hospitals, malls, banks, hotels, high-rise buildings, and other critical facilities where power continuity is essential.

Standard: IEC 60947-6-1

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CZM9
CZM9
Product Information
Selection
CZM9–125M3P125AW2
ModelShell frameBreaking capacityNumber of polesRated currentController code
Dual power automatic transfer switch63(16~63A)M: Standard type3:3P
4:4P		10, 16, 25, 32, 40
50, 63, 80, 100, 125
140, 160, 180, 200
225, 250, 315, 400
500, 630, 800		Default：LED
Y: LCD
W2: Split LED display
W3: Split LCD display
125(16~125A)
250(100~250A)
400(250~400A)
630(400~630A)
800(630~800A)
Operating Conditions
TypeOperating and Installation Conditions
Ambient temperature-5°C ~ +40°C
Installation altitude≤2000m
Max humidity at 40°C≤ 50%
Max humidity at 20°C≤ 90%
Technical Parameters
TypeCZM9
Shell frame63 125 250 400 630 800 
Rated working current In(A)10,16,20,25
32,40,50,63		16,20,25
32,40,50,63
80,100,125		100,125,140
160,180,200
225,250		250, 315
350, 400		400,500,630630,800
Number of poles3, 4
Electrical classClass CB
Use categoryAC33iB
Rated working voltage Ue(V)AC380, 400
Rated insulation voltage Ui(V)AC690AC800
Rated impulse withstand voltage Uimp(KV)8 
Rated short-circuit breaking capacity Icn(KA)15 25 25 35 35 35 
Electrical life1000 1000 500 
Mechanical life5000 3000 2500 
Rated working systemUninterrupt working system
Overvoltage transfer setpointAC230V-AC300V
Undervoltage transfer setpointAC150V~AC210V
Contact switch time<4s
Disconnection delay1s-240s continuously adjustable
Shutdown delay1s-240s continuously adjustable
Function Introduction
FunctionFull-function type
Manual mode■
Automatic mode■
Motor protection function■
Main contact working position (performing circuit breaker)
Normal power supply closed■
Reserve power supply closed■
Double break■
Automatic control
Monitoring normal power supply■
Monitoring reserve power supply■
Self-throwing and self-reset■
Self-throwing and non self-reset■
Reserve for each other■
Power grid-power grid■
Power grid-power generation■
Phase failure instantaneous protection■
Under-voltage protection 150-210Vadjustable
Over-voltage protection 230-300Vadjustable
Fire control function■
Changeover time delay 0-240s continuously adjustable■
Returning time delay 0-240s continuously adjustable■
Frequency display■
Communication functionoptional
Indication
N on/R on/double break indication■
Normal power supply indication■
Reserve power supply indication■
Fault tripping indication■
Parameter setting indication■
Voltage real time indication■
Normal three phase voltage protectionthree phase
Reserve three phase voltage protectionthree phase
Controller

Automatic transfer switch according power supply condition and the parameter that user set to choose if tranfer from one power to the other power. It’s function depends on the controller. There are 3 types(Y, w2 and w3) of controller. The features and functionality of controller as following.

Technical data
ControllerY type ControllerW2 type ControllerW3 type Controller
Working power supplyAC160-250V 50/60HzDC12V(Provided by the in side of Y type controller)
InstallationIntegral typeSplit type
Position3 Positions
Mode of operationAuto,manual and electro-manual operation
Voltage monitoring function3 phase over-voltage,under-voltage and phase loss monitoring
Frequency monitoring functionFrequency monitoring
Generator controlA set of 3A relay dry contact
Fire linkage controlPassive contact input,with a set of normally open passive signal feedback contact
Mode of conversionAccording to users requirement could set at A uto Can set at Auto transfer and auto recover,Auto
transfer and non-auto recovery or utility generator type mode according to user’s requirement.
DisplayLED displayLCD display
Conversion time delay0.5s-60s continuously adjustable
Return time delay0.5s-60s continuously adjustable
ModelMatch circuit
 breaker		PoleRated short circuit
making capacity(lcm)		Rated short circuit
breaking capacity(Icn)		Rated current
of circuit breaker (A)		Rated insulation
voltage(V)
CZM9-63CM1-633 31.5 15 10,16,20,32
40,50,63		690 
4 31.5 15 
CZM9-125CM1-1253 52.5 25 16,20,32,40,
50,63,80,100,125		690 
4 52.5 25 
CZM9-250CM1-2503 52.5 25 125,160,180,
200,225,250		690 
4 52.5 25 
CZM9-400CM1-4003 73.5 35   250,315,350,400690 
4 73.5 35 
CZM9-630CM1-6303 73.5 35 500,630690 
4 73.5 35 
CZM9-800CM1-8003 73.5 35 700,800800 
4 73.5 35 
Dimensions and Installation Sizes(mm)
SpecificationADBCH1H2
3P4P3P4P
CZM9-63380 405 250 340 365 230 <16025 
CZM9-125405 435 250 365 395 230 <17025 
CZM9-250450 480 250 410 440 230 <19025 
CZM9-400570 620 330 510 560 300 <20025 
CZM9-630680 740 330 620 680 300 <25025 
CZM9-800750 820 330 690 760 300 <25025 
lnstallion and Wiring

Switch Installation

  • Fix the device and select wiring based on rated current.
  • Ensure the phase sequence of main and emergency power is the same.

Split Type Controller Installation

  • Fix the controller to the panel using two support brackets.
  • Ensure the controller is correctly inserted into the switching device and firmly secured.
  • Confirm all contact points are reliable and fuses are intact.
  • For insulation withstand tests, remove the controller first to prevent damage.
  • For 3P switches: connect the main neutral wire to N1, and the emergency neutral wire to N2.

         Wiring must be correct and secure to ensure ATS works properly.

  • For 4P switches: connect both neutral wires to their respective breaker N poles.
  • Ensure the switching device is grounded at the marked grounding point.
  • Indicator lights can be connected to corresponding terminals for status observation (refer to wiring diagram).
CZM9 (6)-1755846090

Note:

This diagram applies to three-phase four-wire. When using three-phase three-wire system, the neutral line of main power connects to terminal N1 port, neutral line of emergency power connects to terminal N2 port.

HD main power indication AC220V(User-provided).

TD main power indication AC220V(User-provided).

Name
CZM9 ATS Catalog
Release time
22/08/2025
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