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Panasonic Products for Energy Management

Energy Management

Features for DC Side

AC Side
DC Side

Related Catalog

EP Relays

Go to HE-V Relays

EP Relay Features for DC Side

The EP relay is a power relay that enables DC high voltage and a high current interruption in small size.
Below listed are features compared to DC contactor of existing products generally used in the DC high voltage area.

Sealed construction keeps the arc inside

Safety
Construction

Arc

Free arc space

Space saving

Arc space is necessary for existing products and cannot use adjacent mounting.

The capsule contact construction is lled with H2 gas which provides a large cuto capacity with a small contact gap.

Small

The arc is cooled and intercepted rapidly by the hydrogen mixed gas in the capsule contact.

Hydrogen gas

Operation explanation (interception mechanism)

power to relay is ON.

Stationary
contact

Movable
contact

Stationary
contact

Arc is generated when power to relay is cut.

Arcing

Arc is attracted to the inner wall of sealed capsule contact, preventing arc from running side.

Arcing

Due to external magnetic force, arc runs horizontally over contact surface.

Arcing

EP Relay Estimated Life (Cycles) for DC Side

Reference data

Notes: In case of using over the rating, the data is only reference use. Please test the actual condition befor use.

110A type

220A type

380A type

4200A type

5300A type

HE-V Relays

Back to EP Relays

HE-V Relay Features for DC Side

The HE-V relay is a miniature power relay that can conduct and cut off high DC voltage or high currents. Using a 2 Form A contact, it is capable of both plus and minus line cutoff on the DC side.

Using a blow-out magnet mechanism and serial contact connection, the required arc and gap length is maintained for high DC voltage cutoff.
Over 3.8 mm contact gap
(for each 1 Form A contact)

Safety
Construction

Arc

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

Small

Solar inverter

*Serial connection example

Reduction of power consumption is achieved by reducing the coil holding voltage after applying nominal coil voltage for at least 100 ms during relay operation.

Energy-saving

Nominal operating power Ratio in which coil holding voltage can be decreased Power consumption when coil holding voltage decreases

1,920mW 33%V of rated coil voltage approx. 210mW

Operation explanation (interception mechanism)

Power to relay is ON.

Arc is generated when power to relay contact is cut.

The arc extends inside the arc extinction space and completes cutoff. The arc does not get out.

The arc extends by applying transverse eld.

Inside arc extinction space

Contribute to energy saving with reduced coil holding voltage

In existing products, nominal coil voltage had to be applied to the coil side. However 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 at 20°C

Product	Rated operating power	Ratio in which coil hold voltage can be decreased	Power consumption when coil holding voltage decreases
HE-V Relay	1,920mW	33%V of nominal coil voltage	Approx. 210mW

*1 Coil holding voltage is the coil voltage after 100ms following application of the rated coil voltage.

HE-V Relay 15V

How to reduce coil holding voltage

To reduce coil holding voltage, one way is to set nominal coil voltage over 100ms. However you shall have similar result using below way also.

1. Sample: HEV2aN-P-DC9V (9V type)

2. Circuit
HEV2aN-P-DC9V (9V type)

3. Recommend condition (Ambient temperature: 20˚C)

Coil impress voltage		Coil holding voltage		R (Relay)	C	r	Inrush time	Time until nominal voltage	Voltage in operate time	Operate time
* Time until nominal voltage is more than 1.5 times of operate voltage. The method of reduce coil holding voltage is only reference. Not guaranteed. Please check under the most stringent conditions in the actual application.
[V]	[%V]	[V]	[%V]	[Ω]	[µF]	[Ω]	[ms]	[ms]	[V]	[ms]
12	133.3	4.5	50.0	42.2	640	70.3	76.5	18.0	10.0	11.85

●Wave of coil voltage
HE-V Relay Wave of coil voltage

HE-V Relay Estimated Life (Cycles) for DC Side

Reference data

Notes: In case of using over the rating, the data is only reference use. Please test the actual condition befor use.

1Contact connected in series

21 Form A series

Recommended circuit

Positive polarity of load should be connected to pin 1 and pin 3, refer to the following circuit schematics.

1. Each 1 Form A contact connected in series (Bottom view)
2. 1 Form A contact only (Bottom view)

Catalog Download

Title	Language	File size	Update
エネルギーマネジメント向け商品のご提案	JP	5.1MB	December 6, 2022
Panasonic Industry Products for Energy Management	EN	4.8MB	December 6, 2022

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Nominal operating power	Ratio in which coil holding voltage can be decreased	Power consumption when coil holding voltage decreases
1,920mW	33%V of rated coil voltage	approx. 210mW