CHINT AX21-M8 User Manual

AX21-M8/AL21-M8
SHT21-M8/SHT22-M8/SHT24-M8
UVT21-M8/UVT22-M8/UVT24-M8
User Manual
Thank you for choosing this product.
Before installing, using or maintaining this product,
Please read the instruction manual carefully.
Auxiliary alarm contact slot
snaps into breaker rib
TRIP
Wire outlet after cutting
Press
Press
Click
1N.m
AX21-M8 (auxiliary contact)-correspondingly
installed in the slot marked AX on the circuit
breaker
When the circuit breaker is in the "open" or
"free trip" position
12 11
14
When the circuit breaker is in the "Closed"
position
12 11
14
AL21-M8 (alarm contact)-correspondingly
installed in the slot marked AL on the circuit
breaker
When the circuit breaker is in the "open" or
"closed" position
12 11
14
When the circuit breaker is in the "free trip"
(alarm) position
12 11
14
AX21-M8
Auxiliary contact
AL21-M8
Alarm contact
SHT21/22/24-M8 Shunt release
UVT21/22/24-M8 Under-voltage release
A
Installation of auxiliary contacts and alarm contacts
B
Auxiliary contact, alarm contact
action test
Environmental protection
In order to protect the environment, when this product or
its components are discarded, please properly dispose of
them as industrial waste; or send them to a recycling
treatment station for classification, dismantling, recycling
and reuse according to relevant national regulations.

CHINT AX21-M8 Specifications

General

Category	Cables and Connectors
Model	AX21-M8
Connector Type	M8
Number of Pins	4
Gender	Male
Shielded	Yes
IP Rating	IP67
Cable Length	2 meters

Summary

Auxiliary and Alarm Contact Installation

Auxiliary Alarm Contact Slot Installation

Auxiliary alarm contact slot snaps into the circuit breaker rib for secure mounting.

Auxiliary and Alarm Contact Action Testing

AX21-M8 Auxiliary Contact Test Procedure

Test AX21-M8 auxiliary contact in open/free trip and closed positions per specifications.

AL21-M8 Alarm Contact Test Procedure

Test AL21-M8 alarm contact in open/closed and free trip positions as required.

Shunt and Undervoltage Release Installation

NM8N-250 Frame Installation Snaps

NM8N-250 side snaps securely into the buckle during release installation.

NM8N-400/630 Frame Installation Snaps

NM8N-400/630 type shaft snaps into the buckle for release installation.

Frame Size Installation Notes

Installation guidance for 250-frame and other NM8N series circuit breakers.

Shunt and Undervoltage Release Action Testing

SHT Shunt Release Test

Test SHT 21/22/24-M8 shunt release operation with 70%-110% Un control voltage.

UVT Undervoltage Release Test

Test UVT 21/22/24-M8 undervoltage release behavior at specified voltage levels.