ABB UniGear ZS1 User Manual

8
3.2 Resistance to internal arc
faults
The fault withstand capacity is as follows:
• ...17.5 kV - 50 kA / 1 s
• ...17.5 kV - 63 kA / 0.5 s
• 24 kV - 31.5 kA / 1 s
Main parameters for UniGear ZS1 panels with switch-disconnector
Rated voltage
[kV] 7.2 / 12 17.5 24
Rated power frequency withstand voltage
(1)
[kV / 1 min] 28 38 50
Rated lightning impulse withstand voltage [kV] 75 95 125
Rated frequency [Hz] 50 / 60 50 / 60 50 / 60
Rated current of busbars [A] ...4 000 ...4 000 …3 150
Rated current of branches [A] ...630 ...630 ...630
Rated breaking current of switch-disconnector
(power factor = 0.7)
[A] ...630 ...630 ...630
Rated short time withstand current of switch-
disconnector
(2)
[kA / 1 s] ...25 ...25 ...25
Internal arc withstand current
(3)
[kA / 1 s] …25 …25 …25
Rated peak withstand current [kA] …63 …63 …63
Maximum rated current of the fuses [A] 100 63 63
Auxiliary voltage DC [V]
24 / 48 / 110
/ 220
24 / 48 / 110
/ 220
24 / 48 / 110
/ 220
Auxiliary voltage AC [V] 110 / 230 110 / 230 110 / 230
—
3. Technical data
(1) GB/DL version is available with higher request in dielectric characteristics
(2) Limited by the fuses
(3) The internal arc withstand values are guaranteed in the compartment on the supply side of the fuses (busbars) by the
structure of the switchgear and on the load side (cables) by the limiting properties of the fuses
Main parameters for UniGear ZS1 panels with vacuum contactor
Rated voltage [kV] 7.2 12
Rated insulation voltage [kV] 7.2 12
Rated power frequency withstand voltage [kV / 1 min] 20 (32)
(3)
28 (42)
(3)
Rated lightning impulse withstand voltage [kV] 60 75
Rated frequency [Hz] 50 / 60 50 / 60
Rated short time withstand current
(1)
[kA] ...50 ...50
Peak current [kA] ...125 ...125
Internal arc withstand current
(2)
[kA / 1 s] ...50 ...50
Maximum rated current of the contactor [A] 400 400
The switchgear panels have been tested
according to IEC 62271-200 standard (Annex A,
accessibility type A, IAC classification FLR) and
also to PEHLA recommendation no. 4. In
individual cases, depending on the configuration
of the switchgear panels and/or the switchroom
conditions (e.g. low ceiling height), additional
measures may be necessary to ensure compliance
with criterion 5.
(1) Limited by the fuses
(2) The internal arc withstand values are guaranteed in the compartments on the supply side of the fuses (busbars and
apparatus) by the structure of the switchgear and on the load side (feeder) by the limiting properties of the fuses
(3) Available on request

ABB UniGear ZS1 Specifications

General

Rated Voltage	up to 24 kV
Rated Current	up to 4000 A
Frequency	50/60 Hz
Rated Short-Circuit Breaking Current	up to 50 kA
Rated Peak Withstand Current	up to 125 kA
Insulation	Air-insulated
Type of Switchgear	Metal-clad
Rated Short-time Withstand Current	up to 50 kA for 3s
Internal Arc Classification	IAC AFLR
Protection Degree	IP4X
Busbar System	Single and double busbar
Type Tested Assembly	IEC 62271-200
Dimensions	Varies depending on configuration
Weight	Varies depending on configuration