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Panasonic Products for Energy Management

Panasonic Products for Energy Management

Energy Management

Features for AC Side

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LF-G Relay/HE-S Relay/HE Relay PV Features for AC Side

Suitable for European photovoltaic generation standard IEC62109 and VDE0126 (Maintain a contact gap of at over 1.8 mm.)

Over 1.8mm contact gap is required for the AC circuit side on photovoltaic generation equipment in the European market.

Background that contact gap over 1.8 mm is required in Europe market
The condition of the altitude stipulation (2,000m or more) was added to
the current demand of contact gap over 1.8mm
[over 2.5kV surge breakdown voltage (between contacts)].

Contact gap over 1.8 mm is required for power relays.

LF-G Relay
(22A/31A/33A)
Min. 1.8mm
LF-G Relay
HE Relay PV type
(35A/48A/90A)
Min. 2.5mm
HE Relay PV type

*90A type: Min. 3.0mm

HE-S Relay
(35A)
Min. 3.2mm
HE-S Relay

Contribute to energy saving with reduced coil holding voltage

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.

Condition: Max. contact carrying current (LF-G, HE, HE-S and HE-V)
Product Nominal
operating
power
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
Example LF-G Relay 9V
LF-G Relay 9V

How to reduce coil holding voltage

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.)

1. Example of CR circuit method
Example of CR circuit method

【Operation explanation】
(1) Apply voltage of over rated coil voltage(around 130%V).
(2) Power consumption when relay is ON is controlled using the values of relay coil resistance, C, and R.

*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).

[Depiction of coil voltage/current waveform]

Coil voltage

Coil current

CRCoil voltage CRCoil current
2. Example of switch method
Example of switch method

【Operation explanation】
(1) Operate by turning SW1 ON and applying rated voltage (100%V) to relay coil.
(2) After at least 0.1 s in (1) , turn SW2 ON, turn SW1 OFF and control the power consumption when the relay is ON using the value of resistance R.

*Set the coil holding voltage using resistance R, and the relay coil resistance to reach the voltage you are aiming for (around 50%V).

[Depiction of coil voltage/current waveform]

Coil voltage

Coil current

switch method Coil voltage switch method Coil current
3. Example of PWM method
Example of PWM method

【Operation explanation】
(1) MOS-FET→ON (Voltage supplied to relay coil) Make sure MOS-FET is completely ON (Duty ratio 100%)
(2) After at least 0.1 s of (1) , start PWM control with MOS-FET (Duty ratio 50%), and control the power consumption when the relay is ON.

*We recommend a PWM control frequency of 20 kHz to 100 kHz.

[Depiction of coil voltage/current waveform]

Coil voltage

Coil current

PWM method Coil voltage PWM method Coil current

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HE-S Relay 2 Form A/2 Form A 1 Form B type

Go to DJ-H Relays

HE-S Relay Features for AC Side

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.

Safety construction

Miniature size attained compared to using two 1 Form A contact relays.
Enhanced freedom of design

Space saving

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.

Energy-saving

■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.

Normal operation Malfunction
1De-energize
(Normal operation)
De-energize (Normal operation)
2Excitation
(Normal operation)
Excitation (Normal operation)
3De-energize
(When main contact welded)
De-energize (When main contact welded)

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DJ-H Relay Features for AC Side

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

Safety construction

Low power consumption:
1 coil latching: 1.0 W
2 coil latching: 2.0 W

Energy-saving

Compliant with safety standards for inrush resistance and all types of lighting loads. (UL and VDE)

Safety standard

■Manual switch

Equipped with manual switch for operation verification
Manual relay on/off is possible (when there is De-energize).

■Application examples Lighting control Smart homes
  Lighting control Smart homes
(shutters and blinds)

Supports inrush current loads

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 Tungsten load wave Electronic ballast load wave Capacitive load wave

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Catalog Download

APPLICATION EXAMPLES Title Language File size Update
エネルギーマネジメント向け商品のご提案
初版
JP 6.7MB May 31, 2017
Panasonic Products for Energy Management
1st edition
EN 6.0MB November 30, 2017

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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)