5
Base product data
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A88 circuit breaker with electronic release of KARAT series of IEK
trademark (hereinafter referred to as circuit breaker) is designed to conduct
current in normal mode and turn off overcurrents in case of short circuits and
overloads, as well as for infrequent (up to 30 times a day) operational switching
on and off of electrical circuits in three-phase alternating current electrical
networks with voltage up to 400 V and frequency of 50 Hz.
The circuit breaker meets the requirements of Directive No. 2014/30/EU,
2014/35/EU, IEC 60947-2.
The circuit breaker can be operated under the following conditions:
– operating temperature range from minus 25
°
Ñ
to plus 40
°
Ñ
;
–
base altitude
–
no more than 1000 m, operation at the altitude of up to
2000 m is allowed with a decrease of rated current up to 10 %;
– environment condition group according to IEC 60947-1 – A, B*;
– utilization category according to IEC 60947-2 –
Â
(can be used to ensure
selectivity);
– maximum value of relative humidity – 90 % and at temperature plus 20
°
Ñ
;
– no direct exposure to solar-radiation;
– non-explosive environment, not containing aggressive gases and vapors in
concentrations that destroy metals and insulation, not saturated with conductive
dust and water vapors.
The circuit breaker is intended for use in an environment with pollution
degree 3 (conductive pollution is possible or dry, non-conductive pollution that
becomes conductive due to expected condensation).
The circuit breaker is equipped with an electronic microprocessing release
MP211, which provides overload protection with an inverse long tripping delay
and an inverse time-current characteristic, and also provides short-circuit
protection with adjustable tripping. MP211 parameters are shown in table 2.
Specifications
The technical parameters of the circuit breaker depending on the type are
listed in table 1.
Degree of protection of the circuit breaker case is IP30, of terminals for
connecting external conductors
–
IP00
.
ÂÀ
88 CIRCUIT BREAKERS WITH ELECTRONIC RELEASE
EN
REAL ABILITY
*
When using the circuit breaker in a group B environment, special devices should be used to
protect against unwanted electromagnetic interferences.
K
ARA
T
