System 4

SYSTEM 4 LOW VOLTAGE SWITCHBOARDS

Technical Data
Electrical Data

Rated operational voltage Ue 440V
Rated insulation voltage Ue 690V
Rated frequency Ue 50Hz
Rated current horizontal bushbars 1250-4000A
Rated short time with stand current 50kA 3s




1. Type tested factory built assembly to BS EN 60439: Part1
2. Environment protection IP312 to IP54 to BS EN 60529
3. Internal seperation Form 4 type 5 to BS EN 60439: Part 1
4. Front or rear access cabling versions
5. Compact construction, unrivalled stacking density

Packaged Substations

Indoor packaged substations comprise of a "SYSTEM 4" low voltage switchboard coupled to one or more dry type, air colled, cast resin transformers to IEC 60076/BS EN 60076 (formerly BS 171)

Ratings 500-2500kVA are available with enhanced ratings possible, by forced cooling with the addition of integral fans.

The standard primary and secondary windings are 11kV and 433 Volt respectivelky, connected in Delta/Star, but other primary and secondary voltages are available.

The packaged substation can be in various physical arrangements, to suit the requirements of individual installations.

M-Pact Air Circuit Breakers

1. Incorperation of the M-Pact 2 withdrawable Air Circuit Breaker into SYSTEM 4 switchboards offers state of the art circuit protection and system management together with reliability and performance with which the name M-PACT has always been associated.

2. 3 or 4 Pole configurations

3. ASTA, KEMA & LOVAG certified in accordance with IEC 947-2/BSEN60947

Depending on the selected type the M-PRO protection relkays offer the following features:

1. Earth fault protection
2. 12t Cropping
3. Neutral Protection
4. Thermal memory
5. Communication
6. Trip History and Indication
7. Manual or Automatic Reset
8. Watch dog in case of microprocessor malfunction
9. Plant Associated Memory Module
10. Outputs
11. Programmable Inputs
12. Load Monitoring
13. Overload Protection
14. Short Circuit Protection