Over 1.8mm contact gap is required for the AC circuit side on photovoltaic generation equipment in the European market.
In existing products, nominal coil voltage had to be applied to the coil side. However LF-G Relay, HE-S Relay, HE Relay PV and HE-V Relay will be operated with reduced coil voltage (coil holding voltage *1), so that lower power consumption could be achieved.
Reduce the coil holding voltage after applying the rated coil voltage for 100 ms or longer in that way you could reduce the energy consumption.
|Ratio in which coil holding voltage can be decreased at 20°C||Power consumption when coil holding voltage decreases at 20°C||Ratio in which coil holding voltage can be decreased at 85°C||Power consumption when coil holding voltage decreases at 85°C|
|*1 Coil holding voltage is the coil voltage after 100ms following application of the rated coil voltage.|
|LF-G Relay||1,400mW||35%V of nominal coil voltage||approx. 170mW||45%V of nominal coil voltage||approx. 280mW|
|HE Relay PV||1,920mW||40%V of nominal coil voltage||approx. 310mW||50%V of nominal coil voltage||approx. 480mW|
|HE-S Relay||1,880mW||30%V of nominal coil voltage||approx. 170mW||30%V of nominal coil voltage||approx. 170mW|
|HE-V Relay||1,920mW||33%V of nominal coil voltage||approx. 210mW||33%V of nominal coil voltage||approx. 210mW|
Please refer to the circuit examples below for reducing the coil holding voltage of AC load relays.
Please note, that the methods shown below are just examples and do not constitute any guarantee. Be sure to verify operation in your actual device.
Also, please contact our sales representative if you are considering a holding voltage reduction circuit using DC load relays (HE-V relay and EP relay).
(Please note that for switching DC loads, if a diode is used in the coil surge absorbing element in the relay, the contact opening velocity will slow down and sufficient cutoff performance cannot be guaranteed.)
*For application time of voltages over the rated voltage, please set value of capacitor C to 50 ms or greater.
*Set the coil holding voltage using resistance R, and the relay coil resistance to reach the voltage you are aiming for (around 50%V).
*We recommend a PWM control frequency of 20 kHz to 100 kHz.
The HE-S relay is a 2 Form A and 2 Form A 1 Form B relay that is miniature and features high capacity, built-in auxiliary contacts. In particular, the 2 Form A 1 Form B contact type supports mirror contact mechanisms and can be used to create safety circuits.
2 Form A 1 Form B contact type supports the mirror contact mechanisms.
Detect welding of main contact and create safety circuit.
Contact gap of 3.2 mm or higher.
Miniature size attained compared to using two 1 Form A contact relays.
Enhanced freedom of design
Reduction of power consumption is achieved by reducing the coil holding voltage after applying rated coil voltage for at least 100 ms during relay operation.
■When using 1 Form A/2 Form A relay
For failsafe applications, use four 1 Form A type or two 2 Form A type.
■When using HE-S (2 Form A 1 Form B contact)
Use one 2 Form A 1 Form B type
(creation of contact welding monitoring circuit is possible).
|Rated operating power||Ratio in which coil holding voltage can be decreased||Power consumption when coil holding voltage decreases|
|1,880mW||30%V of rated coil voltage||approx. 170mW|
Explanation of mirror contact mechanism (2 Form A 1 Form B type)
Compliant with EN60947-4-1 mirror contact
|●||Designed so that Form A contact and Form B contact will not close at the same time.|
|●||When From A contact welded, Form B contact gap of at least 0.5 mm is maintained.|
|*||Form B contact, when used to monitor the condition of Form A contact, can be used exclusively as an auxiliary contact.|
(When main contact welded)
This is a 1a 50A high capacity latching relay that can handle lighting and motor loads.
Manual operation verification is possible with the manual switch type.
Supports anti-inrush and all types of lighting loads Equipped with manual switch for operation verification
Low power consumption:
1 coil latching: 1.0 W
2 coil latching: 2.0 W
Compliant with safety standards for inrush resistance and all types of lighting loads. (UL and VDE)
Equipped with manual switch for operation verification
Manual relay on/off is possible (when there is De-energize).
|Lighting control||Smart homes
(shutters and blinds)
Supports all types of inrush loads such as tungsten loads (TV-20 equivalent), electric ballast loads (NEMA410), and capacitor loads (IEC60669-1), etc.
|Load||Tungsten load||Electronic ballast load||Capacitive load|
|Switching capa city||2,400W 120V AC||20A 277V AC||20A 250V AC 200μF|
|Electrical life||Min. 2.5 × 104||Min. 6 × 103||Min. 3 × 104|
|Surge current waveform|
Requests to customers (Automation Control Components & Industrial Device) [Excluding specific product]
Requests to customers (Automation Control Components & Industrial Device) [For specific product]
Requests to customers (FA Sensors & Components [Excluding motors])
Requests to customers (Dedicated to industrial motors)