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Earth-Leakage Relays

Earth-Leakage Relays

  • Unlike on an earth leakage breaker, there is no interruption performed and there is only an earth leakage detection function.
    Detection of the earth leakage is performed (ZCT) and then a signal is sent when there is earth leakage (relay part).
    It is used with a combination of a ZCT (zero-phase current transformer) and a relay.

Structure of Earth-Leakage Relay

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Lineup

Model Interchangeable leakage relays (*1)
Electrical self-hold type Mechanical self-hold type
  Hole diameter (mm) NV-ZBA NV-ZSA
Model of ZCT
(*5)		 15 ZT15B － ZT15B －
30 ZT30B － ZT30B －
40 ZT40B － ZT40B －
60 － ZT60B － ZT60B
80 － ZT80B － ZT80B
100 － ZT100B － ZT100B
Image NV-ZBA NV-ZSA
Wiring system 3φ4W, 3φ3W, 1φ3W, 1φ2W
Control voltage
AC (V)		 JIS 100･200 selectable 100･200 selectable
200･415 selectable
UL/JIS(*2)
UL/CE(*3)		 － －
JIS High
speed
type		 Rated sensitivity current (mA) 30
100・200
・500
selectable		 100・200
500
selectable		 30
100・200
・500
selectable		 100・200
500
selectable
Max. operating time (s) 0.1 0.1
Delay
type		 Rated sensitivity current (mA) 100・200・500 selectable 100･200･500 selectable
(200･500･1000 selectable)
Operating time (s)(*4) 0.3・0.8
・1.6 selectable		 0.3・0.8
・1.6 selectable
Inertial non-operating time (s) or longer than (s) 0.1・0.5・1.1 0.1・0.5・1.1
UL/JIS High
speed
type		 Rated sensitivity current (mA) － －
Max. operating time (s)
Delay
type		 Rated sensitivity current (mA)
Max. operating time (s)(*4)
Inertial non-operating time (s) or longer than (s)
UL/CE High
speed
type		 Rated sensitivity current (mA) － －
Max. operating time (s) at 5IΔn
Delay
type		 Rated sensitivity current (mA)
Max. operating time (s) at 5IΔn (*4)
Inertial non-operating time (s) at 5IΔn
Earth leakage indication Electric type (LED) Mechanical type (button)
Resetting method Push button or control power
switch off		 Push button
(combined with earth leakage indicator)
Built-in contact Configuration 1c 1a1c
Continuous current
capacity (A)		 5 5
Contact capacity (A)
  cosφ=1
L/R=0		 cosφ=0.4
L/R=0.007
AC100V 5 2
AC200V 5 2
DC24V 5 2
  cosφ=1
L/R=0		 cosφ=0.4
L/R=0.007
AC100V 5 3
AC200V 3 2
AC415V 2 1
DC30V 4 3
DC100V 0.4 0.4
DC200V 0.2 0.2
Connection Front ●Clamp terminal ●Clamp terminal
Rear － ●Clamp terminal
Mass (kg) Relay 0.3 0.4
External accessories Terminal cover ●(TC-ZBA) ●(TC-ZSA)
Mounting hook for IEC 35mm rail (DIN rail) Fixture ●(DIN-ZBA) －
Max. consumption (VA) 3
Conforming standard US UL standard
(UR certified)		 － －
European CE marking － －
Model Interchangeable leakage relays (*1)
Harmonic surge ready Harmonic surge ready
Electrical self-hold type Mechanical self-hold type
  Hole diameter (mm) NV-ZHA NV-ZLA
Model of
ZCT
(*5)		 15 ZT15B ZT15B
30 ZT30B ZT30B
40 ZT40B ZT40B
60 ZT60B ZT60B
80 ZT80B ZT80B
100 ZT100B ZT100B
Image NV-ZHA NV-ZLA
Wiring system 3φ4W, 3φ3W, 1φ3W, 1φ2W
Control voltage
AC (V)		 JIS － －
UL/JIS(*2)
UL/CE(*3)		 120･240 selectable
240･440 selectable		 120･240 selectable
240･440 selectable
480
JIS High
speed
type		 Rated sensitivity current (mA) － －
Max. operating time (s)
Delay
type		 Rated sensitivity current (mA)
Operating time (s)(*4)
Inertial non-operating time (s) or longer than (s)
UL/JIS High
speed
type		 Rated sensitivity current (mA) 30　50 30　50
Max. operating time (s) 0.1 0.1
Delay
type		 Rated sensitivity current (mA) 100・200・500 selectable 100・200・500 selectable
Operating time (s)(*4) 0.1・0.45・1.0 selectable 0.1・0.45・1.0 selectable
Inertial non-operating time (s) or longer than (s) －・0.1・0.5 －・0.1・0.5
UL/CE High
speed
type		 Rated sensitivity current (mA) 30・50・100 selectable 30・50・100 selectable
Max. operating time (s) at 5IΔn 0.04 0.04
Delay
type		 Rated sensitivity current (mA) 100・300・500 selectable
300・500・1000 selectable		 100・300・500 selectable
300・500・1000 selectable
Max. operating time (s) at 5IΔn (*4) 0.45・1.0 selectable 0.45・1.0 selectable
Inertial non-operating time (s) at 5IΔn 0.1・0.5 0.1・0.5
Earth leakage indication Electric type (LED) Mechanical type (button)
Resetting method Push button or control power
switch off		 Push button
(combined with earth leakage indicator)
Built-in contact Configuration 1a1c 1a1c
Continuous current
capacity (A)		 5 5
Contact capacity (A)
  cosφ=1
L/R=0		 cosφ=0.4
L/R=0.007
AC120V 5 2
AC240V 5 2
DC24V 5 2
Use auxiliary relay for AC440V contact.
  cosφ=1
L/R=0		 cosφ=0.4
L/R=0.007
AC120V 5 3
AC240V 3 2
AC480V 1 1
DC30V 3 3
Connection Front ●Clamp terminal ●Clamp terminal
Rear ●Clamp terminal ●Clamp terminal
Mass (kg) Relay 0.4 0.4
External accessories Terminal cover ●(TC-ZSA)(*6) ●(TC-ZSA)(*6)
Mounting hook for IEC 35mm rail (DIN rail) Fixture － －
Max. consumption (VA) 3
Conforming standard US UL standard
(UR certified)		 UL 1053
Recognized component
(File No.E196562)		 UL 1053
Recognized component
(File No.E196562)
European CE marking Declaration for conformity
IEC 60947-2 AnnexB
EN 60947-2 AnnexB		 Declaration for conformity
IEC 60947-2 AnnexB
EN 60947-2 AnnexB
  • Notes
  • (1) Interchangeable leakage relays can be easily combined with other relays and our ZCT.
    However, products with 30mA sensitivity (excluding NV-ZHA/ZLA) can only be used in combination with ZT15B, ZT30B and ZT40B.
  • (2) Indicates the UL-standard control voltage. UL, CSA and JIS standards are indicated together. For JIS voltage indications, 100-200V changeover is 120-240V changeover, 200-415V changeover is 240-440V changeover, and 460V and 480V are described together. When ordering, specify "UL/JIS".
  • (3) Indicates the UL-standard control voltage. UL, CSA and CE standards are indicated together. For CE voltage indications, 120-230V changeover is 120-240V changeover, 230-440V changeover is 240-440V selectable, which are described together. When ordering, specify "UL/CE".
  • (4) When operating times are 0.3 and 0.45sec, 0.8 and 1.0sec and 1.6sec, the relay operates between 0.15 and 0.45sec, 0.6 and 1.0sec and 1.2 and 2.0 sec, respectively.
  • (5) Can be combined with an interchangeable ZCT equipped with a primary conductor.
  • (6) Not UL-certified.
  • Remarks
  • (1) Relays with rates shown in parentheses are special-order.
  • (2) The relay complies with CE marking type MITSUBISHI MCCB with a voltage tripping device to interrupt current during ground fault.
  • (3) NV-ZBA/ZSA
    Control Voltage Available voltage range Example of applicable circuit voltage
    100V 80-121V 100・110V
    200V 160-242V 200・220V
    415V 320-484V 400・415・440V
  • (4) NV-ZHA/ZLA
    Control Voltage Available voltage range Example of applicable circuit voltage
    120V 80-132V 100・110・120V
    240V 160-242V 200・220・230・240V
    415V 320-484V 380・400・415・440V
    480V 368-528V 460・480V

    Canada CSA Standards
    C22.2　No.144

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