About the Lrs Series SMPS Variable DC Power Supply for
The Lrs Series SMPS Variable DC Power Supply for is part of the ELEHPD LRS Series range. Lrs Series SMPS Variable DC Power Supply for from the ELEHPD LRS 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: Lrs Series 50W SMPS Variable DC Power Supply for Industrial Equipment Supplies LED CCTV
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 LRS 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
Lrs Series 50W SMPS Variable DC Power Supply for Industrial Equipment Supplies LED CCTV
| Model | LRS-50-12 | LRS-50-15 | LRS-50-24 | LRS-50-36 | LRS-50-48 |
| DC Voltage | 12V | 15V | 24V | 36V | 48V |
| Rated Current | 4.2A | 3.4A | 2.2A | 1.45A | 1.1A |
| Current Range | 0~4.2A | 0~3.4A | 0~2.2A | 0~1.45A | 0~1.1A |
| Rated Power | 50.4W | 51W | 52.8W | 52.2W | 52.8W |
| Ripple and Noise | 120mvp-p | 120mvp-p | 150mvp-p | 200mvp-p | 200mvp-p |
| 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 time | 1000ms, 30ms/230VAC 2000ms,30ms/115VAC at full load |
| Hold up time | 30ms/230VAC 12ms/115VAC at full load |
| Voltage Range | 85 ~ 264VAC 120 ~ 373VDC (Withstand 300VAC surge for 5sec. Without damage) |
| Frequency Range | 47~63HZ |
| Efficiency | 86% | 86% | 88% | 89% | 90% |
| AC Current | 0.95A/115VAC 0.56A/230VAC |
| Inrush Current | COLD START 45A/230VAC |
| Leakage Current | <0.75mA / 240VAC |
| Over Load | 110 ~ 150% rated output power |
| Protection type : Hiccup mode, recovers automatically after fault condition is removed |
| Working Temp | -20 ~ +70ºC (Refer to "Derating Curve") |
| Working Humidity | 20 ~ 90% RH non-condensing |
| Storage temp,humidity | -40 ~ +85ºC, 10 ~ 95% RH |
| Temp. Coefficient | ±0.03%/ºC (0 ~ 50ºC) |
| Withstand Voltage | I/P-O/P:3.0KVAC I/P-FG:2KVAC O/P-FG:1.25KVAC |
| lsolation Resistance | I/P-O/P, I/P-FG, O/P-FG:100M Ohms / 500VDC / 25ºC/ 70% RH |
| Demension | 99*82*30mm (L*W*H) |
| Weight/Packing | 0.23Kg |
Frequently asked questions about the Lrs Series SMPS Variable DC Power Supply for
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.
Related LRS Series models
Further reading
