S series power supply S-500W

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-500W

The S series power supply S-500W is part of the ELEHPD S Series range. 500W Single output switching power supply Features: • Universal AC input / Full range • Protections:Short circuit/Over load/Over voltage • Forced air cooling by built-in DC fan • PWM control and regulated • Built-in cooling Fan ON-OFF control • 100% full load burn-in test • Fixed switching frequency at 25KHz • Low cost • 2 years warranty 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

500W Single output switching power supply

Features :

• Universal AC input / Full range

• Protections:Short circuit/Over load/Over voltage
• Forced air cooling by built-in DC fan
• PWM control and regulated
• Built-in cooling Fan ON-OFF control
• 100% full load burn-in test
• Fixed switching frequency at 25KHz
• Low cost
• 2 years warranty

Model Specification	S-500-5	S-500-12	S-500-15	S-500-24	S-500-48
DC Output voltage	5V	12V	15V	24V	48V
Output voltage range(Note:2)	±2%	±1%	±1%	±1%	±1%
Rated output current	80A	40A	32A	20A	10.4A
Output current range	0~80A	0~40A	0~32A	0~20A	0~10.4A
Wave and noise(Note:3)	75mVp-p	120mVp-p	150mVp-p	240mVp-p	240mVp-p
Inlet stability(Note:4)	0.5%	±1%	±1%	±1%	±1%
Load stability(Note:5)	±3%	±1%	±1%	±0.3%	±0.3%
DC output power	400W	480W	480W	480W	500W
Efficiency	80%	83%	84%	86%	87%
Adjustable range for DC voltage	±10%	±10%	±10%	±10%	±10%
AC input voltage range	100~132VAC/190~240VAC 250~340VDC
Input current	5A/230V
Power factory	0.65 - 0.75
AC Inrush current	46A/230V
Leakage current	< 3.5mA/240VAC
Overload protection	105%-150% Type: cut down output. Reset: auto recovery.
Over-voltage protection	120%-150%
High-temperature protection	ERH3≥ 65°C~70°CFan on, ≤55°C~60°CFan off, ≥80°C~85. Cut off output (5-15V)~(24-48V)
Temperature coefficient	±0.03%/°C
Setup, rise, hold up time	1s, 100ms, 50ms
Vibration	10~500Hz, 2G 10min,/1 cycle. Period for 60min, Each axes
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
Working temperature and humidity	(-10°C)~+60°C, 10%~95%RH
Store temperature and humidity	(-20°C)~+85°C, 10%~95%RH
Overall dimension	238X124X65mm (LWH)
Weight	1.22Kg
Safety standards	GB4949, UL60950, EN60950
EMC standards	According to GB9254 EN55022 EN55024 A level design
Note: 1. The parameter under the testing condition: 230VAC input, rated load, 25°C70% RH. Temperature. 2. Tolerance: Including setting tolerance, circuit stability and load stability. (Note:5). 3. Wave test: Adopting “A12” double wire for 20MHz, and 0.1 UF&47UF capacitor short-circuit for interrupting. 4. Inlet voltage stability test: the lowest voltage will be up to the highest voltage when the circuit overload. 5. Load stability test: The load is from 0% to 100%. 6. C3, 4 must be knocked down.

Frequently asked questions about the S series power supply S-500W

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.