A SK-10 cubicle switchboard

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Описание

Cubicle switchboard cabinets are designed for operation as part of a switchboard assembly in the three-phase alternating current circuits with a frequency of 50 Hz, rated voltage of 6 or 10 kV with an insulated neutral earthed through an arc-suppression coil or a neutral resistive earthed.

Cubicle switchboard cabinets are designed for operation under the following environmental conditions:

the maximum height of the device above sea level is not more than 1000 m;
an ambient operating temperature range is from – 25°C to + 40° C;
relative humidity not exceeding 75% at a temperature of +150 °C;
atmosphere type II according to GOST 15150;
non-explosive environment that does not contain current-conducting dust, aggressive gases and vapors the concentrations of which destroy materials and insulation.

Technical properties

Characteristic	Value
Rated voltage, kV	6;10
Maximum operating voltage, kV	7,2; 12
Rated current, A - of the main circuits of the cubicle switchboard cabinets - of busbars	630; 800; 1000; 1250; 1600; 2000; 2500; 3150 1600; 2500; 3150
Rated breaking current of a power circuit breaker, kA	20; 25; 31,5
Short-time thermal current, kA	20; 25; 31,5
Duration of a short-time thermal current flow, sec: - of main current-carrying circuits - of earthed circuits	3 1
Short time electrodynamic current, kA:	51; 64; 81
Rated voltage of auxiliary circuits, V: - with DC - with AC - with lighting circuits	110; 220 100; 220 24
Standards of tests of main current-carrying circuit insulation with a power supply at a frequency of 50 Hz for 1 minute, kV: - among the phases and with respect to the ground - among the contacts of the power circuit breaker	37,8 37,8
Standards of tests of main current-carrying circuit insulation with 1,2/50 mks lightning impulse, kV: - among the phases and with respect to the ground - among the contacts of the power circuit breaker	75 75
Standards of tests of control circuit and auxiliary circuit insulation with a power supply at a frequency of 50 Hz for 1 minute, kV:	2
Electrical insulation resistance, MOhm, not less than: - of main circuits - of secondary circuits	1000 100
Mechanical durability and service life, not less than: - the number of operations of vertical and single pole grounding conductors moving a withdrawable part (hereinafter referred to as a WP) from the control position into operating position and back - opening and closing the doors of switchboard cabinets - opening and closing a shutter mechanism - switching on and off the dismountable contact systems of the main circuits	2000 1000 1000 1000 1000
Life until discarded, years, not less than	30
Ingress protection rating according to GOST 14254	IP31

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A SK-10 cubicle switchboard

Description

Cubicle switchboard cabinets are designed for operation as part of a switchboard assembly in the three-phase alternating current circuits with a frequency of 50 Hz, rated voltage of 6 or 10 kV with an insulated neutral earthed through an arc-suppression coil or a neutral resistive earthed.

Cubicle switchboard cabinets are designed for operation under the following environmental conditions:

the maximum height of the device above sea level is not more than 1000 m;
an ambient operating temperature range is from – 25°C to + 40° C;
relative humidity not exceeding 75% at a temperature of +150 °C;
atmosphere type II according to GOST 15150;
non-explosive environment that does not contain current-conducting dust, aggressive gases and vapors the concentrations of which destroy materials and insulation.

Technical properties

Characteristic	Value
Rated voltage, kV	6;10
Maximum operating voltage, kV	7,2; 12
Rated current, A - of the main circuits of the cubicle switchboard cabinets - of busbars	630; 800; 1000; 1250; 1600; 2000; 2500; 3150 1600; 2500; 3150
Rated breaking current of a power circuit breaker, kA	20; 25; 31,5
Short-time thermal current, kA	20; 25; 31,5
Duration of a short-time thermal current flow, sec: - of main current-carrying circuits - of earthed circuits	3 1
Short time electrodynamic current, kA:	51; 64; 81
Rated voltage of auxiliary circuits, V: - with DC - with AC - with lighting circuits	110; 220 100; 220 24
Standards of tests of main current-carrying circuit insulation with a power supply at a frequency of 50 Hz for 1 minute, kV: - among the phases and with respect to the ground - among the contacts of the power circuit breaker	37,8 37,8
Standards of tests of main current-carrying circuit insulation with 1,2/50 mks lightning impulse, kV: - among the phases and with respect to the ground - among the contacts of the power circuit breaker	75 75
Standards of tests of control circuit and auxiliary circuit insulation with a power supply at a frequency of 50 Hz for 1 minute, kV:	2
Electrical insulation resistance, MOhm, not less than: - of main circuits - of secondary circuits	1000 100
Mechanical durability and service life, not less than: - the number of operations of vertical and single pole grounding conductors moving a withdrawable part (hereinafter referred to as a WP) from the control position into operating position and back - opening and closing the doors of switchboard cabinets - opening and closing a shutter mechanism - switching on and off the dismountable contact systems of the main circuits	2000 1000 1000 1000 1000
Life until discarded, years, not less than	30
Ingress protection rating according to GOST 14254	IP31