415V IFR AIR CIRCUIT BREAKER RETROFIT

WHIPP & BOURNE IFR CIRCUIT BREAKER

In recognising the customers needs to support old and obsolete circuit breakers, SIM have developed a (RET IFR-NW) for the 415V IFR Whipp & Bourne Circuit Breaker.

The retrofit consists of installing a Merlin Gerin NW ACB within the existing Whipp & Bourne carriage. The existing switchboard protection can be retained by using a Non-Automatic type ACB or a new micrologic programmable protection relay which can be incorporated with to the
ACB.

The main interlocks have been retained in the modification to prevent the retrofit being installed or removed from the switchboard whilst in the closed position. By carrying out the retrofit this way it alleviates the necessity to modify the main switchboard busbars.

A Cost effective solution which guarantees future support and reliability for many years

As part of the retrofit package, customers drawings are updated on CAD to the latest standards producing standard drawings for each circuit type.

Advantages:

– Efficient Upgrade For Aging Equipment
– Guaranteed Future Support
– Innovative Method Saves Time & Money
– Updated CAD Drawings

TECHNICAL DATA VACUUM ACB TYPE NW

Rated Insulation Voltage uI : 1000V
Rated Withstand Voltage Uimp : 12kV
Rated Operational Voltage Ue : 690V 50/60Hz
Degree Of Pollution : IEC 60664-1 4
Current Ratings : 800 to 3200A
Complying To Standard : BSEN 60947-2
(Circuit Breaker)
Ultimate Breaking Capacity Icu : 65kA rms
Service Breaking Capacity Ics : 65kA rms
Rated Short-Time Withstand Icw : 65kA/1 Sec rms
Rated Making Capacity Icm : 143kA Peak
Complying To Standard : BSEN 60947-3
(Switch – Disconnector)
Rated Making Capacity Icm : 105-187kA Peak
Rated Short-Time Withstand Icw : 50/85kA / 1 Sec rms
36/75kA / 3 Sec rms