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| Frame Rated Current | 160 | 250 | 400 | 630(800) |
| Product Model | UKM30RT-160 | UKM30RT-250 | UKM30RT-400 | UKM30RT-800 |
| Rated Current (A) | 25/32/40/50/63 80/100/125/160 |
125/160/175/200/250 | 250/300/350/400 | 500/630/700/800 |
| Poles | 3 | 4 | 3 | 4 | 3 | 4 | 3 | 4 |
| Rated Instantaneous Short-Circuit Current Setting | Inx(5~10) | |||
| Rated Overload Current Setting | Inx(0.8~1.0) | |||
| Rated Insulation Voltage UI(V) | AC690 | |||
| Arcing Distance (mm) | ≤50(0″) | |||
| Rated Ultimate/Service Short-Circuit Breaking Capacity (kA) | AC690V: 5/3 AC415V: 35/22 |
AC690V: 10/7 AC415V: 70/50 |
||
| Operational Performance (times) | ON: 2500 OFF: 8500 |
ON: 2500 OFF: 8500 |
ON: 1500 OFF: 5000 |
ON: 1000 OFF: 4000 |
| Rated Operation Frequency (per hour) | 120 | 120 | 60 | 20 |
UKM30RT Adjustable MCCB 250A 3 Poles/4 Poles Moulded Case Circuit Breaker
The UKM30RT series Moulded Case Circuit Breaker (hereinafter referred to as the circuit breaker) is an advanced, high-performance, aesthetically designed, and compact device.
It offers multiple configuration options, including adjustable or non-adjustable overload current settings and adjustable or non-adjustable instantaneous short-circuit current settings, providing users with greater flexibility and customisation to meet diverse application needs.
Compliant with standards including GB/T 14048.2 “Low-voltage switchgear and controlgear—Low-voltage circuit-breakers” and IEC 60947-2 “Low-voltage switchgear and controlgear—Part 2: Circuit-breakers.”
Free Quote NowKey Features
- Power System Compatibility: AC 50/60Hz, rated voltage up to 690V, rated current 25-800A.
- Protection Functions: Shields against overload, short circuit, undervoltage; enables infrequent motor control.
- Temperature Range: Ambient air -5℃ to +40℃.
- Altitude Limit: ≤
- Humidity Tolerance: ≤50% at +40℃; ≤90% in the wettest month (avg min temp ≤+25℃).
- Pollution & Installation: Pollution degree 3, installation category Ⅲ.
- Terminal Connection: “1,3,5, N1” for power; “2,4,6, N2” for load (no reverse connection).
Applications
- Power Distribution Protection: Provides reliable overload, short-circuit, and under-voltage protection for main and branch circuits in low-voltage power distribution systems.
- Motor Protection & Control: Safeguards motors and allows for infrequent starting and stopping operations in industrial applications.
- General Industrial & Commercial Use: Ideal for switchboards, control panels, and various electrical installations in buildings, factories, and infrastructure projects.
- As a Main or Branch Switch: Can be utilised as a main circuit isolation switch or to protect individual branch circuits.
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