Technical data

1
©1995 Square D—All Rights Reserved
11/98
Standard Compliance
n UL489: MP08 to MP50 circuit breakers and their accessories are Listed under UL files E63335,
E103955 and E113555
n UL1066/ANSI: MC08 to MC50 circuit breakers are UL Listed according to UL1066 (ANSI C37-13)
under file E161835
n International Standards: the MASTERPACT
®
circuit breaker has been designed to meet all the
major standards including:
o IEC 947-2 and related standards such as VDE, BS, EN, etc.
o JEC, JIS
n UL 1008: MP12, MP20 and MP30 circuit breakers are suitable for use in transfer switch
equipment
n Marine Applications:
o Homologated by Bureau Veritas
o Approved by Det Norske Veritas and Germanische Lloyd's
o Listed by Lloyd's Register of Shipping
o American Bureau of Shipping application
o UL marine
High Short-time Current Rating: Up to 100 kA for 1 sec.
The exceptional short-time rating of 75,000 A in a 3000 A frame and 100,000 A in a 4000 A frame
and above allows the circuit breakers
to be fully selective up to their interrupting ratings.
100% Rated
The circuit breakers are designed for continuous operation at 100% of their current rating.
Other Performances
The UL 489 and UL1066 (ANSI C37-13) standard performance tests assure that the circuit breaker
has sufficient characteristics to be used in normal conditions. However, the circuit breaker exceeds,
without additional costs, the UL standard 1,500 operations required in endurance. The heavy-duty
mechanism and the contact design provide a mechanical endurance of 10,000 operations (approx.)
without maintenance (see page 64).
Tropicalization
The standard moisture and fungus protection ensure normal operation under extreme ambient
conditions. MASTERPACT
circuit breakers comply with T2 tropicalization (IEC Standard 68-2-30);
relative humidity 95% at 113°F (45°C) and 80% at 131°F (55°C) (hot, humid climate). Salt spray
resistance as per IEC 68-2-11.
Poles
The 4-pole version is an efficient solution to ground fault problems created by incorrectly grounded
standby generators and incorrect transfer switching systems. By isolating the neutral of multiple
sources coupled together, 4-pole circuit breakers prevent ground faults from returning to the source
via unintended paths. Where unintended paths exist, ground fault sensing can become inaccurate or
create nuisance tripping.
Introduction
Ampere Rating (A) 3-Pole 4-Pole
800 MP-MC MP-MC
1200 MP MP
1600 MP-MC MP-MC
2000 MP-MC MP-MC
2500 MP MP
3000 MP MP
3200 MC
4000 MP-MC MP (1)
5000 MP-MC MP (1)
6300 MP (1)
(1) Not UL Listed.