S series power supply S-145W

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 S series power supply S-145W

The S series power supply S-145W is part of the ELEHPD S Series range. 145W Single Output switching power supply Features: • AC input range selectable by switch • Protections:Short circuit/Over load/Over voltage • Cooling by free air convection • 100% full load burn-in test • Fixed switching frequency at 25KHz • LED indicator for power on • Made in China for low cost • High reliability • 1 years warranty Parameter ELEHPD manufactures and exports low voltage electrical products from Yueqing, Zhejiang, China, supplying distributors, panel builders, M&E contractors and OEM buyers worldwide.

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 S 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

145W Single Output switching power supply

Features :

• AC input range selectable by switch

• Protections:Short circuit/Over load/Over voltage

• Cooling by free air convection

• 100% full load burn-in test

• Fixed switching frequency at 25KHz

• LED indicator for power on

• Made in China for low cost

• High reliability

• 1 years warranty

Parameter:

Model	S-145-5	S-145-7.5	S-145-12	S-145-15	S-145-24
Output	DC Voltage	5V	7.5V	12V	15V	24V
Rated Current	25A	18A	12A	9.6A	6A
Current Range	0 ~ 25A(30A max.)	0 ~ 18A(21A max.)	0 ~ 12A(14A max.)	0 ~ 9.6A(11A max.)	0 ~ 6A(7A max.)
Rated Power	125W	135W	144W	144W	144W
Ripple & Noise (max.) Note.2	100mVp-p	120mVp-p	120mVp-p	120mVp-p	150mVp-p
Voltage Adj. Range	4.5 ~ 5.5V	6~8.3V	10.6~13.2V	13.5~16.5V	21~28V
Voltage Tolerance Note.3	±2.0%	±1.0%	±1.0%	±1.0%	±1.0%
Line Regulation	±0.5%	±0.5%	±0.5%	±0.5%	±0.5%
Load Regulation	±0.5%	±0.5%	±0.5%	±0.5%	±0.5%
Setup,Rise, Hold time	100ms, 50ms, 20ms at full load
Input	Voltage Range	88 ~ 132VAC/176 ~ 264VAC selected by switch
Frequency Range	47~63HZ
Efficiency(Typ.)	78%	80.5%	80.5%	81%	83.5%
AC Current	3.2A/115VAC 1.6A/230VAC
Inrush Current (max.)	COLD START 35A
Leakage Current	<3.5mA / 240VAC
Protection	Over Load	125 ~ 165% rated output power
Protection type : Shut down o/p voltage, re-power on to recover
Over Voltage	5.6 ~ 6.8V	8.6 ~ 10V	13.8V~16.2V	17.3V~20.3V	29V~32V
Protection type : Shut down o/p voltage, re-power on to recover
Environment	Working Temperature	-10 ~ +60°c (Refer to output load derating curve)
Working Humidity	20~90% RH Non-condensing
Storage temp.& humidity	-20~+85°C, 10~95%RH
Temp. coefficient	±0.03%/°C (0~50°C)
Vibration	10 ~ 500Hz, 2G 10min./1 cycle,60min.each along X,Y,Z axes
Safety & EMC (Note 4.)	Safety Standards	Design refer to UL1012
Withstand Voltage	I/P-O/P:1.5KVAC I/P-FG:1.5KVAC O/P-FG:0.5KVAC
Isolation Resistance	I/P-O/P, I/P-FG, O/P-FG:100M Ohms/500VDC
EMI Conduction & Radiation	Compliance to EN55022 (CISPR22) Class B
EMS IMMUNITY	Compliance to IEC801-2,3,4 Light industry level, criteria A
Others	MTBF	286.7K hrs min. MIL-HDBK-217F (25°c )
Dimension	1999838mm (LWH)
Packing	0.71Kg; 30pcs/22.5Kg/1.22CUFT
Note	1. All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25°c of ambient temperature. 2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1uf & 47uf parallel capacitor. 3. Tolerance : includes set up tolerance, line regulation and load regulation. 4. C3,4,22,41,63,140,141 must be removed. 5. Refer to output derating curve us input voltage.

OVERALL DIMENSION

Frequently asked questions about the S series power supply S-145W

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.