Three groups output 120W switching power supply

Q: What is the difference between a contactor and a relay?

A contactor is built for switching power circuits repeatedly at high current, often with motor duty ratings (AC-3) and arc-suppressing chambers. A relay switches control signals at low current. In practice: contactor for the motor, relay in the control circuit that drives the contactor coil.

Q: How do I calculate the correct contactor size for a motor?

Use the motor's full-load current, apply the AC-3 rating for the operating voltage, and allow for the number of starts per hour. As a rule of thumb, the contactor's AC-3 rating should be at least equal to the motor FLC, then step up one frame if the duty is heavy.

Q: Do you supply the coil voltage I need?

Coil voltages are specified per order. Send the model number, coil voltage and frequency you require and we will confirm availability and lead time.

Q: Are auxiliary contacts included?

Base models come with the standard auxiliary contact configuration for that frame. Add-on auxiliary blocks and mechanical interlocks can be quoted with the contactor.

About the Three groups output 120W switching power supply

The Three groups output 120W switching power supply is part of the ELEHPD Multiple Series range. Three groups output 120W switching power supply from the ELEHPD Multiple Series range. ELEHPD manufactures and exports low voltage electrical products from Yueqing, Zhejiang, China, supplying distributors, panel builders, M&E contractors and OEM buyers worldwide.

Full catalogue description: Three groups output 120W popular type switching power supply

Typical applications

Motor control centres and pump or fan starters
Machine building, conveyors, packaging and CNC equipment
HVAC control panels and building automation
Water treatment, irrigation and pumping stations
Panel retrofits replacing electromechanical control gear

How to specify the right Multiple Series

Size the contact rating for the inductive load, not just the resistive current (AC-3 duty for motors)
Check the coil voltage and frequency available in the panel: 24 V DC, 110 V, 230 V or 400 V AC
Confirm the auxiliary contact count needed for the control and indication circuit
Match the enclosure rating to the environment (IP20 inside a panel, IP65 on the machine)

Specifications

Three groups output 120W popular type switching power supply

T-120W Triple output switching power supply
Model NO.	OUTPUT	Tolerance	range	efficiency
T-120A	5V, 2-12A 12V, 0.5-5A -5V, 0.2-1A	± 2% ± 6% ± 6%	80mV 120mV 80mV	77%
T-120B	5V, 2-12A 12V, 0.5-5A -12V, 0.2-1A	± 2% ± 6% ± 6%	80mV 120mV 120mV	77%
AC input voltage range	85-132vac/170-264vac 47-63hz 240-370vdc
input current	2.5A/115V 1.25A/230V
AC inrush current	Cold-start current 30A/115V 60A/230V
Leakage current	< 3.5mA/240VAC
DC adjustable range	± 10% rated output voltage
over load protection	105-150%cut down output, auto-recovery
over-voltage protection	115-135%
set up, rise, hold up time:	800ms, 20ms 20ms
withstand voltage:	I/P-O/P: 1.5KVAC 1Minutes I/P-FG: 1.5KVAC 1MInutes O/P-FG: 0.5VAC 1minutes
working temperature	-10~+60° C, 20-90%RH
weight/packing:	0.9kg, 20pcs/18kg
Material	Aluminum
Size	19911050M M
certificate	CE ISO9000 ROHS
Warranty year	1 year
Protections	Short circuit / Over load / Over voltage

Frequently asked questions about the Three groups output 120W switching power supply

What is the difference between a contactor and a relay?

A contactor is built for switching power circuits repeatedly at high current, often with motor duty ratings (AC-3) and arc-suppressing chambers. A relay switches control signals at low current. In practice: contactor for the motor, relay in the control circuit that drives the contactor coil.

How do I calculate the correct contactor size for a motor?

Use the motor's full-load current, apply the AC-3 rating for the operating voltage, and allow for the number of starts per hour. As a rule of thumb, the contactor's AC-3 rating should be at least equal to the motor FLC, then step up one frame if the duty is heavy.

Do you supply the coil voltage I need?

Coil voltages are specified per order. Send the model number, coil voltage and frequency you require and we will confirm availability and lead time.

Are auxiliary contacts included?

Base models come with the standard auxiliary contact configuration for that frame. Add-on auxiliary blocks and mechanical interlocks can be quoted with the contactor.