Page 4 - SGC SwitchGear Company

1.3. STANDARDS

The DW-2 system has been certified according to IEC (In-
ternational Electrotechnical Commission) standards:

The whole concept conforms to ISO procedures, certifi-
cates and even with ISO 9001 guidelines. Cubicle testing
is carried out in accordance with IEC regulation and self-
enforced quality requirements.

“All cubicles are

built according to

IEC 62271-200”

1.4. TYPE TESTS

DW-2 switchgear solutions are all fully type tested Metallic shutters and partitions segregate the compart-
according to IEC 62271-200: ments from each other. When a compartment is opened
all other panels in the installation and all cable termina-
• Short time and peak withstand current tion compartments (including that in the panel concerned)
• Dielectric test on main and auxiliary circuits remain in operation.
• Making and breaking capacity of the circuit
• Mechanical operations breaker within the panel
• Temperature rise and main circuit impedance
• Internal arc fault (IAC classified: AFLR, 31.5A/1s)
• Earthing switch making capacity

AVAILABILITY AND PARTITION

DW-2 switchgear is designed in compliance to
availability classes LSC2B and partition class PM
according to IEC 62271-200.

The switchgear compartments do not need any tools
for opening. Interlocks allow access only when the cor-
responding high voltage parts are dead and earthed.

Internal arc fault test, 31.5kA/1s

4 THE SPECIALIST IN MEDIUM VOLTAGE SWITCHGEAR