AL-X3 Alarm contact

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AL-X3-Accessories (Final Power Distribution)-Side-1

AL-X3-Accessories (Final Power Distribution)-Side-2

AL-X3 Alarm contact

The CHINT AL-X3 Alarm Contact is an auxiliary signaling device designed for use with NXB-125 series circuit breakers. It provides remote indication of circuit breaker status (ON/OFF/trip) to improve monitoring and safety in electrical systems. When integrated, it signals whether the breaker is manually opened or tripped due to a fault. Built to IEC 60947-5-1 standards, the AL-X3 offers a 10,000-cycle lifespan, high contact reliability, and compact modular design for easy DIN-rail installation.

Product Information

Function: Provides long-distance signal indication of the circuit breaker’s ON/OFF status and trip alarms.
Applicable Breaker: NXB-125 series circuit breakers
Standards Compliance: IEC 60947-5-1
Certifications: CE, RoHS
Utilization Category: AC-12, DC-12
Rated Operating Voltage (Ue):
- AC: 240V / 415V
- DC: 24V / 48V / 130V
Rated Operating Current (Ie):
- AC 415V: 3A
- AC 240V: 6A
- DC 130V: 1A
- DC 48V: 2A
- DC 24V: 6A
Contact Operation:
- Alarm contact open → terminals 91–94 connected
- Alarm contact closed → terminals 91–92 connected
- Manual open → 91–92 remain connected
- Trip open (fault) → 91–92 open, 91–94 connected
Mechanical Life: 10,000 cycles
Mounting Method:
- Remove left cover of NXB-125 breaker before assembly
- Mount assembled unit on TH35-7.5 DIN steel rail (illustrated on page 134)
Dimensions (mm):
- Height: 81.0 ±1.4
- Width: 9 ±0.18
- Depth: 75.2 ±1.2 (see Figure 3, page 134)
- Mounting holes: 45 ±0.31 / 50.5 ±0.31 spacing

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AL-X3-ACCESSORIES-(FINAL-POWER-DISTRIBUTION)-Catalog.pdf

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2025-12-24

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2004-AL-X3-Accessories (Final Power Distribution)-Manual.pdf

478.58KB

2024-09-22

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2507-AL-X3-Accessories (Final Power Distribution)-CE Declaration.pdf

533.47KB

2025-09-11

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FAQs

What is the purpose of the AL-X3 Alarm Contact?

It provides remote indication of circuit breaker status (manual open, close, or trip), enabling fault alarms or status monitoring in electrical panels.

Which circuit breakers is it compatible with?

The AL-X3 is designed for use with NXB-125 series circuit breakers, mounted directly to the side via the provided connector system.

How does the contact operate during faults?

If the breaker trips due to an electrical fault, terminals 91–92 open while 91–94 close, sending a clear alarm signal to external monitoring systems

What installation steps are required?

Remove the left cover of the NXB-125 breaker, attach the AL-X3 module, and mount the assembly on a TH35-7.5 DIN rail.

What is its durability and compliance standard?

The AL-X3 meets IEC 60947-5-1 standards and supports up to 10,000 mechanical cycles, ensuring reliable performance in long-term monitoring applications.