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1
Scope of Application
This transfer switch is suitable for the dual-power supply system with AC 50 Hz, rated working
voltage of 230 V (Level 2), 400 V (Level 3, 4) or below and rated current of 16 A to 630 A. It can
simultaneously detect the two power supplies of the power supply system: the common power
supply (N) and the standby power supply (R), and automatically (or manually) switch from the
abnormal power supply to the normal power supply when the power supply is in undervoltage
and phase failure, so as to improve the continuity, safety and reliability of the power supply
system in the place of use.
This transfer switch is widely used in power systems, hospitals, posts and telecommunications,
fire control, hotels, banks, airports, docks, residential quarters, television stations, military
facilities, shopping malls and other important places with high requirements for power supply
continuity.
2
Standard Followed
The switching device complies with GB/T 14048.11
Low-voltage Switchgear and Controlgear —
Part 6-1:
Multiple Function Equipment — Transfer Switching Equipment
, which is equivalent to
IEC 60947-6-1.
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Model Description
4
Normal Working Conditions
4.1 The ambient air temperature shall be -5°C ~ +40°C. The average temperature within 24
hours shall not 35°C.
4.2 The altitude of the installation location shall not exceed 2,000 m.
4.3 The relative air humidity at the installation site shall not exceed 50% when the ambient air
temperature is +40°C. A higher relative humidity is allowed at a lower temperature. For
example, when the average minimum temperature in the wettest month is +20°C, the
monthly average maximum relative humidity of that month can reach 90%. Appropriate
measures shall be taken to prevent condensation caused by temperature change.
4.4 Contamination grade: Grade 3. There is no explosion danger and no gas or conductive
dust that corrodes metals or damages insulation in the surrounding air.
4.5 The installation category is Grade III.
4.6 Two power lines are connected to the upper terminal of the switching device, and the
load line is connected to the lower terminal, which cannot be reversed.
4.7 The installation location shall be free of significant vibration and impact.
Optional function code: W — Fire control linkage feedback function
(optional for the standard type only, not for the economical type)
None: Power grid — Power grid;
F: Power grid — Generator (optional for the standard type only)
Controller code: A — Economical type; B — Standard type
Number of poles: 2: 2 poles; 3: 3 poles; 4: 4 poles
Shell frame level rated current: 125; 250; 630
Product electrical appliance level: PG
Design number
Product code: Automatic Transfer Switching Equipment
Enterprise code: HUANYU HIGH-TECH CO., LTD.
