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Panasonic Home Business > Industrial Devices > Automation Controls Top > Components & Devices > Relays / Couplers > Panasonic Products for Smart Grids Solutions


Panasonic Products for Smart Grids Solutions

Panasonic Products for Smart Grids Solutions

Smart Grids Solutions

Application Introduction

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Photovoltaic Power Generation System

Recommended products

HE-V
HE-V
For cutoff of solar strings

Programmable Display
Programmable Display
Eco-POWER METER
Eco-POWER METER
Current Transformer
Current Transformer (CT)
*Measuring and displaying power generated, sold, and purchased

LF-G
LF-G
HE PV
HE PV
HE-S
HE-S
• For AC safety cutoff

AQZ
AQZ
For electrical shock
prevention and bypass
(efciency improvement)

EP
EP
For DC safety cutoff

[Junction box]

Inverter

Power
distributor

Load

Grid

[Power conditioner]

AQ-A EP HE-V
AQ-A EP HE-V
• Battery charge/discharge switching
• For DC safety cutoff
For inrush current prevention

Storage battery

Recommended products (AC side)

HE PV
HE PV
HE-S *
HE-S
LF-G
LF-G

Programmable Display
Programmable Display
Eco-POWER METER
Eco-POWER METER
Current Transformer
Current Transformer (CT)

Inverter

Power
distributor

Load

Grid

* When using HE-S relay.

*Use one 2a1b type (creation of contact welding monitoring circuit is possible).

Recommended
relay

For Safety Cutoff on the AC side
Relays are used for safety cutoff on the grid (power network). The relay must cutoff the circuit to prevent abnormal currents that occur from affecting the commercial power supply. Power relays are required as safety measures to protect the power supply system.
Eco-POWER METERs/Programmable Displays
These are used for displaying the amount of sold/purchased power of a photovoltaic power generation system and power generated by a power conditioner. Photovoltaic power generation systems and fuel cell systems linked to storage batteries require surveillance of reverse power (tidal current) to grids. Equipped with a fine current detection function, Eco-POWER METERs are ideal for reverse power (tidal current) surveillance.

Recommended products (DC side)

For Solar strings

HE-V
HE-V

For Junction box connectors

AQZ PhotoMOS
AQZ

Recommended
relay

*1,000 V DC is the maximum allowable voltage when each 1 Form A contact is connected in series. The rating is 800 V DC.

●When something shades the solar panels or a defect occurs, the total power generation efciency of the system decreases. In such cases, the total power generation efciency can be maintained by bypassing low-efciency panels or cutting off strings using relays.
●In case of a disaster, such as re, system safety can be maintained by shorting each solar panel. (E.g. electrical shock prevention of reghters)
●Remote control is possible for maintenance work, reducing maintenance costs.

Recommended
relay

For Junction boxes and Power conditioners

EP
EP

●In case of a disaster, such as re, system safety can be maintained by cutting off the DC line.
●Remote control is possible for maintenance work, reducing maintenance costs.
●Large current cuttoff possible during malfunction when connecting storage battery. (80 to 300A type)

Recommended
relay

*1,000 V DC is the maximum allowable voltage. The rating is 400 V DC.


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Power Storage System

Inverter

AC plug

Load

Storage battery

Storage battery

LF-G HE-S HE PV
LF-G HE-S HE PV
(LF-G/HE PV: 1a 22A-90A 250V AC)
(HE-S: 2a/2a1b 35A 277V AC)

EP HE-V AQ-A
SSR
EP HE-V AQ-A
(EP : 1a 10A-20A 1,000V DC*1)
(HE-V : 2a 20A 1,000V DC*2)
(AQ-A : 1a 10A 600V DC)

*1 1,000 V DC is the maximum allowable voltage. The rating is 400 V DC.
*2 1,000 V DC is the maximum allowable voltage when each 1 Form A contact is connected in series. The rating is 800 V DC.

PhotoMOS
PhotoMOS
Max. load voltage 1,500 V are available.
For available types, please consult us.

EP AQ-A
SSR
EP AQ-A
(EP : 1a 20A-300A 1,000V DC*)
(AQ-A : 1a 10A 600V DC)

* 1,000 V DC is the maximum allowable voltage. The rating is 400 V DC.

Other
recommended
product
Equipment receptacle
For Safety Cutoff on the AC side
Relays are used for safety cutoff on the grid (power network). The relay must cutoff the circuit to prevent abnormal currents that occur from affecting the commercial power supply. Power relays are required as safety measures to protect the power supply system.
For Safety Cutoff on the DC Side
Power relays are required as safety measures in the event of a defect in or malfunction of the battery or system.
For Charge and Discharge
AQ-A SSR (PhotoMOS) is used to switch charge and discharge. We recommend solid state relays for applications where there will be frequent ON/OFF switching.

Charge control
Discharge control
Storage battery

1
Regular operation
Turn ON both solid state relays for charge and discharge control.
Current flows in both directions.
2
Over-charge prevention
In order to prevent over charging, the solid state relay on the charge control side turns OFF.
On the discharge side, current will flow because there is a diode.
3
Over-discharge prevention
In order to prevent over discharging, the solid state relay on the discharge control side turns OFF.
On the charge side, current will flow because there is a diode.
Charge and discharge control is possible by effectively utilizing the internal diodes of the solid state relay.
Equivalence circuit of output side
*If you want to use charge and discharge control by internal diodes of the solid state relay, please contact our sales team.
(Maximum switching capacity differs from output section.)

For preventing an inrush current into capacitors when charging (pre-charge circuit)
AQ-A SSR (PhotoMOS), HE-V relay, and 10A and 20A types of EP relays are used for preventing an inrush current into capacitors when charging. We recommend solid state relays for miniaturization and HE-V relay and 10A and 20A types of EP relays for high voltages.

Main relay
(For DC safety cutoff)

Inverter

Using high-capacity capacitor.
Possibility of inrush current

Inrush current prevention relay
(pre-charge relay)


During device startup, the inrush current prevention relay turns ON and the main relay turns ON after the capacitor is charged.
Effective for protection against inrush currents that occur when charging the capacitor.
For Insulation Detection
PhotoMOS are used for monitoring storage battery units for insulation deterioration
If the insulation in a unit deteriorates, a ground-fault current passes when the relay is turned on, and a sensor detects the current.
High load voltage type PhotoMOS are ideal for use with storage batteries, which carry high voltage.

Alarm signal output
<abnormal case>

Current sensor

Storage battery

Current sensor

Section with deteriorated insulation

Inside of a storage battery unit

If insulation is deteriorated in a section, a current passes when the relay is turned on.

(When insulation of high voltage area and chassis is deteriorated)
1. PhotoMOS is turned on.
2. The current sensor detects a ground-fault current.
3. An alarm signal is output.

Current

For Battery Monitoring
PhotoMOS are used in a circuit for monitoring charging voltages of a battery cell group.
Compact PhotoMOS capable of frequent switching are ideal for this type of use.
Use of the relays allows for insulation from high voltage areas.

When charging the capacitor

[Battery cell side]

[Measurement
side]

1. PhotoMOS on the battery cell side are turned on.
2. The capacitor is charged.

When measure

[Battery cell side]

[Measurement
side]

1. PhotoMOS on the battery cell side are turned off.
2. PhotoMOS on the measurement side are turned on.
3. The voltage of capacitor (= voltage of battery cell group) is measured.

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Quick Charger Stations

AC side

DC side

Electric vehicle

PhotoMOS
30 to 60 V type

PhotoMOS

LF-G HE-S HE PV
LF-G HE-S HE PV
(LF-G/HE PV: 1a 22A-90A 250V AC)
(HE-S: 2a/2a1b 35A 277V AC)

PhotoMOS
PhotoMOS
Max. load voltage 1,500 V are available.
For available types, please consult us.

EP
EP
(1a 80A-300A 1,000V DC*)

* 1,000 V DC is the maximum allowable voltage. The rating is 400 V DC.


For Safety Cutoff on the AC side
Relays are used for safety cutoff on the grid (power network). The relay must cutoff the circuit to prevent abnormal currents that occur from affecting the commercial power supply. Power relays are required as safety measures to protect the power supply system.
For Insulation Detection
PhotoMOS are used for monitoring quick charger stations for insulation deterioration.
If the insulation in a station deteriorates, a ground-fault current passes when the relay is turned on, and a sensor detects the current. High load voltage type PhotoMOS are ideal for use with quick charger stations, which carry high voltage.
For Safety Cutoff on the DC Side
Power relays are required as safety measures in the event of a defect in or malfunction of the battery or system.
For Signal Control  For IC card activation
For models that require the use of IC cards for charge control, etc., low on-resistance type PhotoMOS are used for signal control.

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Smart Meters

To the power distributor (home)

To the distribution network
(Power company)

Main relay

Display

Input controller

Control circuit

Interface for data
communication

PhotoMOS

External output
for accessories

DW relay
LQ relay

Data I/O
RS485

Electric water heater, etc.

PhotoMOS
AQ-H
SSR
PhotoMOS PhotoMOS
For driving circuit: 60 V type
For communication: 350/400 V type

DZ-S
DZ-S
(1a 90A 250V AC)

DW
DW
LQ
LQ
(1a 8A 250V AC) (1a 10A 125V AC)

Other
recommended
product
For Main Power Cutoff
Main relays are used for cutting off the main power. There is demand for a remote cutoff function for rolling blackouts, a prepaid system, safety measures, responses to non-payment of electric bills, etc.
For External Output of Accessories
Relays are used for driving a contactor to turn on a electric water heater using power at night.
For Driving Main Relays
PhotoMOS and AQ-H SSRs are used for driving main relays.
For Data Communications
PhotoMOS are used as output contacts for external communications.

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Rapid Shutdown System (NEC2014 690.12)

For power line emergency cutoff device of photovoltaic power generation system

Emergency
cutoff device

Inverter

Emergency cutoff button
(when fires occur, etc.)

HE-V
HE-V
UL standard compliant
(20A 600VDC)

For power line cutoff during reghting
[What is a rapid shutdown system?]
This is a system designed to cut off the DC power line on the panel side of photovoltaic power generation equipment.
In North America, the NFPA (National Fire Protection Association) is likely to soon define this (690.12) and legislate it into law within NEC2014 (National Electric Code 2014), due to the occurrence of electrocution among firefighters when putting out fires. Also, in Germany installation of this system is a requirement to obtain fire insurance.

[NEC2014 690.12 denition (summary)]
• Emergency cutoff device (controlled by relay) shall install in less than 1.5 m (5 ft) in length inside a building, or less than 3 m (10 ft) in length outside a building from a PV array.
• Controlled conductors shall be limited to less than 30 V and 240 VA within 10 seconds of rapid shutdown initiation.
• The use of UL standard certified components is a requirement in system configurations.

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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 Smart Grids Solutions
3rd edition
EN 5.8MB November 30, 2015

If you have any questions about our products, feel free to email or call us!

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