S-300W S series single output manufacture China

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-300W S series single output manufacture China

The S-300W S series single output manufacture China is part of the ELEHPD S Series range. 300W Single output switching power supply 12v 24v 48v 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.

Full catalogue description: S series single output manufacture China Liushi power supply S-300W

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

300W Single output switching power supply 12v 24v 48v

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	S-300-5	S-300-7.5	S-300-12	S-300-13.5	S-300-15	S-300-24	S-300-27	S-300-48
Output	DC Voltage	5V	7.5V	12V	13.5V	15V	24V	27V	48V
Rated Current	50A	40A	25A	22A	20A	12.5A	11A	6A
Current Range	0 ~ 30A	0 ~ 20A	0 ~ 12.5A	0 ~ 11.2A	0 ~ 10A	0 ~ 6.5A	0 ~ 5.6A	0 ~ 3.2A
Rated Power	250W	300W	300W	297W	300W	300W	297W	288W
Ripple & Noise (max.) Note.2	150mVp-p	150mVp-p	150mVp-p	150mVp-p	150mVp-p	150mVp-p	200mVp-p	240mVp-p
Voltage Adj. Range	4.5 ~ 5.5V	6~9V	10~13.2V	12 ~ 15V	13.5~18V	20~26.4V	26 ~ 32V	41 ~ 56V
Voltage Tolerance Note.3	±2.0%	±2.0%	±1.0%	±1.0%	±1.0%	±1.0%	±1.0%	±1.0%
Line Regulation	±0.5%	±0.5%	±0.5%	±0.5%	±0.5%	±0.5%	±0.5%	±0.5%
Load Regulation	±1.0%	±1.0%	±0.5%	±0.5%	±0.5%	±0.5%	±0.5%	±0.5%
Setup,Rise, Hold time	200ms, 50ms, 20ms at full load
Input	Voltage Range	90 ~ 132VAC / 180 ~ 264VAC by switch 254 ~ 370VDC
Frequency Range	47~63HZ
Efficiency(Typ.)	73%	76%	74%	79%	78%	81%	82%	83%
AC Current	6.5A/115VAC 4A/230VAC
Inrush Current (max.)	50A/115VAC 50A/230VAC
Leakage Current	<3.5mA / 240VAC
Protection	Over Load	105 ~ 150% rated output power
Protection type : Hiccup mode, recovers automatically after fault condition is removed
Over Voltage	5.75 ~ 6.75V	9.4 ~ 10.9V	13.8V~16.2V	15.5 ~ 18.2V	18V~21V	27.6V~32.4V	33.7 ~ 39.2V	57.6 ~ 67.2V
Protection type : Hiccup mode, recovers automatically after fault condition is removed
Function	Fan on/ off Control	RTH3 ≥55°c FAN ON, ≤45°c FAN OFF, ≥80°c output shutdown (5 ~ 7.5V)
RTH3 ≥65°c FAN ON, ≤55°c FAN OFF, ≥80°c output shutdown (12 ~ 15V)
RTH3 ≥70°c FAN ON, ≤60°c FAN OFF, ≥85°c output shutdown (24 ~ 48V)
Environment	Working Temperature	-10 ~ +50°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	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
Others	MTBF	234.3K hrs min. MIL-HDBK-217F ( 25°c )
Dimension	21511550mm (LWH)
Packing	1.07Kg; 12pcs/13.5Kg/0.92CUFT
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.

Dimension

Frequently asked questions about the S-300W S series single output manufacture China

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.