What type of electrical component is this?
This item is a ComPact NS1250N circuit breaker designed for electrical distribution applications. It is a fixed, 4-pole device with a MicroLogic 2.0 electronic trip unit and a rated current of 1250 A at 50 °C.
What is the rated operational voltage?
The rated operational voltage is 690 V AC at 50/60 Hz, making it suitable for high-capacity low-voltage distribution systems.
What breaking capacity does this circuit breaker provide?
It has an ultimate short-circuit breaking capacity of 50 kA at 380/415 V AC and 440 V AC. Other ratings include 85 kA at 220/240 V AC, 40 kA at 500/525 V AC, and 30 kA at 660/690 V AC.
What trip unit is fitted to this circuit breaker?
The circuit breaker is fitted with a MicroLogic 2.0 electronic trip unit. It provides LI protection, meaning long-time overload protection and instantaneous short-circuit protection.
What does the 4-pole 4D configuration mean?
The 4-pole 4D configuration means the device has four poles and four protected poles, including neutral protection. The neutral position is on the left.
Is this circuit breaker suitable for isolation?
Yes. This circuit breaker is suitable for isolation in accordance with EN/IEC 60947-2.
What are the main physical dimensions?
The unit measures 280 mm wide, 327 mm high, and 147 mm deep. Its net weight is approximately 18 kg.
How is this circuit breaker mounted and connected?
This is a fixed-mount circuit breaker intended for backplate installation. It has front connections on both the upper and lower sides, with a connection pitch of 70 mm.
What adjustment ranges are available for overload protection?
The long-time pickup setting Ir is adjustable from 0.4 to 1 times In across 9 settings. The long-time delay is also adjustable, with ranges of 12.5 to 600 seconds at 1.5 x Ir, 0.5 to 24 seconds at 6 x Ir, and 0.7 to 16.6 seconds at 7.2 x Ir.
What adjustment range is available for instantaneous protection?
The instantaneous pickup setting Ii is adjustable from 1.5 to 10 times Ir. The device also has integrated instantaneous protection rated at 40 kA.
What environmental conditions can it operate in?
The circuit breaker is rated for operation from -25 °C to 70 °C and storage from -50 °C to 85 °C. It is suitable for 0 to 95% relative humidity and operation up to 2000 meters without derating, or up to 5000 meters with derating.
What ingress and impact protection ratings does it have?
The unit has an IP40 degree of protection according to IEC 60529 and an IK07 impact protection rating according to EN 50102.
What standards and certifications apply to this circuit breaker?
This circuit breaker conforms to EN/IEC 60947-2 and carries ASTA and ASEFA certifications.
What indication features are included?
The unit includes local indication with four red LEDs for fault indication and one yellow LED for overload indication. It also includes positive contact indication.
What auxiliary contact arrangement is included?
The circuit breaker includes one NO/NC auxiliary contact arrangement, allowing indication or control circuit integration where required by the panel design.