Kutai electronics EA200A User manual

KUTAI ELECTRONICS INDUSTRY CO., LTD.
TEL : [phone] FAX : [phone] Website : www.kutai.com.tw
Headquarters : No.3, Ln. 201, Qianfu St., Qianzhen Dist., Kaohsiung City 806037, Taiwan
EA200A
Generator Automatic Voltage Regulator
Operation Manual
200 Amp Automatic Voltage Regulator
Compatible with Self Excited Carbon Brush Type Generators
Full Wave & Half Wave Version Selectable

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2EA200A
TABLE OF CONTENTS
Section Page
SECTION 1：SPECIFICATION .............................................................................................................................3
SECTION 2：OUTLINE DRAWING.......................................................................................................................4
SECTION 3：INTERNAL SPECIFICATION..........................................................................................................5
SECTION 4：TERMINAL.......................................................................................................................................7
4.1 Excitation Output Terminal .........................................................................................................................7
4.2 Power Input Terminal..................................................................................................................................7
4.3 TB2 Signal Input / Output Terminal ............................................................................................................7
4.4 TB3 Signal Input / Output Terminal ............................................................................................................8
SECTION 5：SETTING AND ADJUSTMENT BEFORE OPERATE ....................................................................9
5.1 Set sensing voltage and Fan voltage..........................................................................................................9
5.2 EA45AF Adjustment..................................................................................................................................10
5.3 EA45C Adjustment....................................................................................................................................12
5.4 EB500 Adjustment....................................................................................................................................13
5.5 EP4-1 Multiple Protective Relay...............................................................................................................13
SECTION 6：FIELD FLASHING .........................................................................................................................14
6.1 Automatic Field Flash ...............................................................................................................................14
6.2 Manual Field Flash....................................................................................................................................14
SECTION 7：OVER TEMPERATURE PROTECTION........................................................................................14
SECTION 8：EXTERNAL EMERGENCY STOP POWER GENERATION.........................................................14
SECTION 9：WIRING DIAGRAM........................................................................................................................15
SECTION 10：TROUBLE SHOOTING ...............................................................................................................16
SECTION 11：APPENDIX...................................................................................................................................17
11.1 Internal drawing.......................................................................................................................................17
11.2 EP4-1 Operation Manual ........................................................................................................................18
11.3 Internal wiring diagram............................................................................................................................20

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EA200A 3
SECTION 1 : SPECIFICATION
Sensing Input (S1、S2) Average Reading
Analogue Voltage Input (A1、A2)
Voltage 85 to 550 Vac 1 phase 2 wire
Input resistance greater than 2K Ohm
Adjustment 85 to 125 Vac @ 110 Vac
Max. input +/- 5 Vdc or 0 10 Vdc
Range 170 to 250 Vac @ 220 Vac
Sensitivity 1 Vdc for 2% (Trim adjustable)
300 to 440 Vac @ 380 Vac
340 to 510 Vac @ 440 Vac
Quadrature Droop Input (C1、C2)
380 to 550 Vac @ 480 Vac
CT N:5A greater than 5VA
Frequency 50 / 60 Hz selectable
Sensitivity +/- 7% @PF +/- 0.5 (Droop adjustable)
Power Input (AC1、AC2)
Soft Start Ramp Time
Voltage 160 to 280 Vac 1 phase 2 wire
3 secs. +/- 10%
Frequency 40 to 60 Hz
Voltage Regulation
Excitation Output (at 220 Vac Input, Half-wave)
Less than +/- 0.5% (with 4% engine govering)
Voltage Continuous 63 Vdc Max. 90 Vdc
Current Continuous 200A Max. 250A 10 Sec.
Typical System Response
Resistance Min. 0.3 ohms Max. 100 Ohm
Less than 20 milliseconds
Excitation Output (at 220 Vac Input, Full-wave)
Static Power Dissipation
Voltage Continuous 125 Vdc Max. 180 Vdc
Max. 40 watts
Current Continuous 200A Max. 250A 10 Sec.
Resistance Min. 0.6 ohms Max. 100 Ohm
UnderFrequencyProtection(Kneepointfactorypreset)
Half-wave and Full-wave Selectable
50 Hz system presets knee point at 45 Hz
60 Hz system presets knee point at 55 Hz
Controller Power Input (B+、B-)
Voltage 24 Vdc (20 to 28Vdc)
Environment
Current Lesser than 10A
Operating Temperature 40 +60 ˚C
DC Power supply for initial field flashing,
excitation current display, alarm protection function.
Storage Temperature -40 +85 ˚C
Relative Humidity Max. 95%
External Volts Adjustment (VR1、VR2)
Max. +/- 3.5% @ 1 KΩ 1/2 watt potentiometer
Max. +/- 7% @ 2 KΩ 1/2 watt potentiometer
Dimensions
600.0 (L) x 305.0 (W) x 860.0 (H) mm
23.62 (L) x 12.01 (W) x 33.86 (H) inch
Weight
67 Kg +/- 2%
147.7 lb +/- 2%
ATTENTION
※Disconnect AVR wiring before using high resistance meter or withstand voltage tester, to avoid the
AVR damaged by high voltage.
※Make sure you have read and understand the contents of the instruction manual prior to installation.
Incorrect wiring connection may result in irreversible damage to the product and other equipment.
※This Automatic Voltage Regulator is not equipped with loss-Sensing Protection function / Over
Excitation Protection. An additional Over-Voltage Protection device for load may be required to avoid
possible damage to the equipment or severe personal injury or death.
※All AC voltage readings are average value only.

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4EA200A
SECTION 2 : OUTLINE DRAWING
A V V
290.0 [11.42"]
305.0 [12.01"]
550.0 [21.65"]
600.0 [23.62"]
860.0 [33.86"]
920.0 [36.22"]
[inch]
Unit : mm
ATTENTION
※The unit must be installed/ repaired by qualified technician.
※AVR could be installed in any suitable locations of the generator sets, the appearance and fixing
holes are as (Figure 1), avoid high temperature, moisture, and location where AVR cannot be easily
reached.
※AVR heat sink may reach a high temperature (above 60 ˚C) when AVR is powered, do not touch or
ground AVR heat sink.
Figure 1. Outline Drawing

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EA200A 5
SECTION 3 : INTERNAL SPECIFICATION
A V V
EA45AF
1 2 3
456
7 8
9
10
Item
Description / Function
1
Field current meter
2
Field voltage meter
3
Generator voltage meter (Sensing voltage)
4
Over temperature alarm indicator
5
Auto / Manual Field Flash selector
6
Over temperature shutdown indicator
7
Power input MCCB
8
EA45AF-2 Control Module
9
50 Hz / 60Hz Frequency Selector
10
Half Wave / Full Wave selector
Figure 2.

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6EA200A
11 12 13 14
15
16
17
18 19
20
21
22 23 24 25
26
Item
Description / Function
11
EA45C Parallel Module
12
EB500 Automatic Flashing Module
13
EP4-1 DC Voltage Protection Module
14
10A DC Power Protection Fuse
15
Temperature switch
16
Rectifier Diode D1, D2, D3 and Heatsink
17
Hall Effect-Based Current Sensor
18
SCR 2 and Heatsink
19
SCR 1 and Heatsink
20
Terminal TB4 (for internal wiring)
21
Terminal TB5 (for sensing voltage and voltage selector for Fan)
22
Terminal TB1 (for Excitation output)
23
Power input MCCB
24
Terminal TB2
25
Terminal TB3
26
Sensing voltage / Fan Power Transformer (under the iron frame)
Figure 3

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EA200A 7
SECTION 4 : TERMINAL CONNECTION
TB2
A1
A2
C1
C2
S1
S2
VR1
VR2
B+
B-
TB3
TB1 F+F- AC2 AC1
4.1 Excitation field output Terminal
TB1
F+、F-
Connect Excitation Field + and −
The recommended wire diameter is 60mm2 or 00(2/0)AWG or greater
4.2 Power input Terminal
NFB
AC1、AC2
Connect Power Input
The recommended wire diameter is 60mm2 or 00(2/0)AWG or greater
4.3 TB2 Signal Input / Output Terminal
TB2
OVER TEMP.
ALARM
Over Temp. Pre-Alarm Output Contact (Max. 2A @ 250 Vac)
Contact CLOSED when Temp. is over 100˚C；Contact OPENED when Temp. is below 90˚C
(Refer to Section 7)
OVER TEMP
SHUTDOWN
Over Temp. Shutdown Contact (Max. 2A @ 250 Vac)
Contact CLOSED when Temp. is over 130˚C；Contact OPENED when Temp. is below 120˚C
(Refer to Section 7)
BATTERY
ABNORMAL
Battery Voltage Abnormal Alarm Contact (Max. 2A @ 250 Vac)
Contact CLOSED when Battery voltage is below 20V or over 28V
OIL SW
Oil Pressure Switch for Automatic Flashing Unit (Refer to Section 6)
EMERGENCY
SHUTDOWN
External Emergency Stop Switch to Stop Power Output to Generation
OPEN ː Normal Operation, CLOSE ː STOP Power Output to Generation
(Refer to Section 8)
Figure 4

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8EA200A
TB2
A1
A2
C1
C2
S1
S2
VR1
VR2
B+
B-
TB3
TB1 F+F- AC2 AC1
Figure 5
4.4 TB3 Signal Input / Output Terminal
TB3
A1、A2
Parallel Controller Analog Voltage Input (0 to 10Vdc or +/-5Vdc) A1 is GND
C1、C2
CT Input (N:5A 5VA)
S1、S2
Sensing Input
VR1、VR2
External Voltage adjust potentiometer (1KΩ 1/2W)
Must be shorted when not in used.
B+、B-
DC24V Power input
ATTENTION
※This Automatic Voltage Regulator is not equipped with loss-Sensing Protection / Over Excitation
Protection. An additional Over-Voltage Protection device for load may be required to avoid possible
damage to the equipment or severe personal injury or death.
※The connection wire for VR1, VR2 and A1, A2 must be shielded wire, the grounding wire of shielded
wire should be as close as possible to the AVR.
※The A1 and A2 signal must be isolated from the power.
※All the power of EA200A protection system were supplied by 24Vdc, the B+ and B- terminal must be
connected correctly, otherwise all the protection, Self-Excited, and the Field Current meter cannot be
used.

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EA200A 9
SECTION 5 : SETTING AND ADJUSTMENT BEFORE START
5.1 Select and set sensing input voltage and Fan voltage
Example :
220V Output Voltage:
S1 & S2 connect to R-T (220V)
MCCB AC1 & AC2 connect to R-T (220V)
FAN VOLT: Cross connect COM1 & 220V
SENSING VOLT: Cross connect COM2 & 220V
400V Output Voltage :
S1 & S2 connect to R-T (400V)
MCCB AC1 & AC2 connect to S-N (230V)
FAN VOLT: Cross connect COM1 & 220V (select the closest voltage 230V)
SENSING VOLT: Cross connect COM2 & 380V (select the closest to 400V)
440V Output Voltage :
S1 & S2 connect to R-T (440V)
MCCB AC1 & AC2 connect to S-N (254V)
FAN VOLT: Cross connect COM1 & 245V (select the closest voltage 254V)
SENSING VOLT: Cross connect COM2 & 440V
480V Output Voltage :
S1 & S2 connect to R-T (480V)
MCCB AC1 & AC2 connect to AUX Power (180V)
FAN VOLT: Cross connect COM1 & 190V (select the most close voltage 180V)
SENSING VOLT: Cross connect COM2 & 480V
※FAN VOLT must be selected to the closest voltage on MCCB AC1 & AC2
※SENSING VOLT must be selected to the closest voltage on S1 & S2
ATTENTION
※The factory preset FAN VOLT is 277Vac, SENSING VOLT factory preset is 110Vac. Make adjustment
before operation on the first time installation.
Figure 6
277V
245V
220V
190V
COM1
480V
440V
380V
220V
110V
COM2
TB5
FAN VOLT
SENSING VOLT

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10 EA200A
5.2 EA45AF Adjustment
5.2.1 Stability Adjustment
Look at the DC field voltmeter on the panel. When there is no load, turn the STAB knob counterclockwise until the
pointer of the field voltmeter swinging. And then, adjust the STAB knob clockwise until the swinging field voltmeter
pointer is just stable, then turn it clockwise a bit more (5~10 degree).
5.2.2 Under Frequency Adjustment
Note：Under Frequency protection factory preset 45/55Hz.
Follow below steps to adjust the setting when necessary.
i. Set frequency selector to required frequency setting
(50Hz U/F adjustable range：40~50Hz)
(60Hz U/F adjustable range：50~60Hz)
ⅱ. Start the Generator, then adjust the generator frequency to the desired knee point frequency
ⅲ.Turn the U/F knob clockwise until the U/F LAMP light is off.
ⅳ. Adjust the U/F knob counterclockwise until U/F LAMP just lights up (or flashing).
ⅴ. Adjust the generator frequency to normal speed.
ATTENTION
※Improper setting of under-frequency protection could cause the output voltage of the unit to drop or
become unstable under with changes in load. Avoid making any changes to the U/F setting unless
necessary.
AUTOMATIC
VOLTAGE REGULATOR
U/F LAMP
POWER LAMP
F S +HI LO
STAB. VOLT. U/F
POWER LAMP
Lights up when AVR is powered.
STAB. Adjustment
Stability Adjustment
U/F LAMP
Lights up when the generator is in U/F
(Under Frequency Protection)
U/F Adjustment
Under Frequency knee point adjustment
VOLT Adjustment
Voltage adjustment for Generator output
Figure. 7

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EA200A 11
Full Wave
Half Wave
50Hz
60Hz
Figure. 8
5.2.3 Generator Frequency Selector
Select Generator frequency for U/F protection (Factory preset 60Hz)
50 Hz system factory presets knee point at 45 Hz
60 Hz system factory presets knee point at 55 Hz
5.2.4 Half Wave / Full Wave Selector
Select half wave or full wave output according to Generator excitation voltage in full load (Factory preset Half Wave).
If generator excitation voltage is greater than 60Vdc in Full load, must select Full Wave output.
If generator excitation voltage is less than 30Vdc, must select Half Wave output.
ATTENTION
※Do not change the Under Frequency setting or Half Wave / Full Wave setting when generator is
running.

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12 EA200A
5.3 EA45C
C1 C2 440 380 220 0
-
+
TO PCB C.T SENSING
DROOPTRIM
A1
A2 EA45C
Figure. 9
EA45C is a Parallel Module. The Droop and Trim must be adjusted when in used for parallel operation, factory
preset is counterclockwise to the end.
DROOP ːAdjust the quadrature droop ratio of C1, C2 current compensation input value to generator output voltage.
When CT and AVR sense that the output voltage and current of the generator are out of sync (leading or lagging),
the AVR will increase (lead) or decrease (lag) the generator voltage. Droop was used to adjust the influence ratio of
CT input current to the generator voltage. Turn counterclockwise to the end is 0%, and clockwise to the end is +/-7%
(Max.).
TRIM：Adjust the influence ratio of the analog voltage input value of A1 and A2 to the generator voltage. When the
system provides DC voltage to terminals A1 and A2, the higher the DC voltage, the higher the generator voltage,
and vice versa. The TRIM knob is used to adjust the influence ratio of the DC input voltage to the generator voltage,
the counterclockwise to the end is 0, and clockwise to the end is +/-10% (Max.).
ATTENTION
※The A1 and A2 signal must be isolated from the power.
EA45C Terminals
SENSING
Sensing Voltage Input
C.T
CT N : 5A
TO PCB
Connect to EA45AF-2
A1、A2
Analog Voltage Input
0 to +/- 5 Vdc
EA45C Adjustment
(adjust according to the situation)
DROOP
Quadrature Droop compensation
Adjustment
TRIM
Analogue voltage compensation
adjustment

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EA200A 13
5.4 EB500 Auto Flash Module
B- B+F+ F-
10 Ohm 1~8 Sec
ABC
5 Ohm
AC2 AC1
EB500
Flash timer adj.
Figure 10
When EB500 powered by B+ and B-, there will have excitation output on F+ and F-. The excitation output will be
terminated when AC1, AC2 reach 30VAC or the Flash time is reach flash timer setting. If re-excitation is required, the
B+ and B- must be powered off and then re-powered.
The Maximum Excitation Flash current can be set by A, B, C terminal (selected by jumper)
A、B、C (Open) 24V = 1.6A
A−B (Short) 24V = 2.4A
B−C (Short) 24V = 4.8A
5.5 EP4-1 Multifunctional voltage relay
EP4-1 is a DC voltage abnormal warning relay
Factory Preset Value
Under volt：20V Over volt：28V
Under voltage delay time：5s Over voltage delay time：5s
DIP SW：1 –OFF、2 –OFF、3 –ON、4 –ON
ATTENTION
※EB500 Flash Current factory preset is A-B shorted
※Due to the limitation of DC current input, do not short A –C.
Volt Time
Over Under
Test Reset
L1
Over Under
L2
L3
V
S
Figure 11
EB500 Terminals
B+、B-
DC Voltage Input
F+、F-
Connect to Magnetic Field +
and -
AC1、AC2
Connect to Power Input
EB500 Adjustment
Flash timer
adj.
Adjustable range
1 to 8 seconds
A、B、C
Flash Current Selection

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14 EA200A
SECTION 6 : FIELD FLASHING
6.1 Automatic Field Flashing
i. Set the FLASH switch to AUTO position
ii. Connect the OIL SW on TB2 terminal by following one of below three wiring
iii. Starting generator, the EA200A will automatically establish voltage
B3+
B+
pressure SW
High oil
Connet to Starter(+)
or
Connet to Fuel valve(+)
B3+
B+
6.2 Manual Field Flashing
Simply switch the FLASH switch to MANU position if Generator needs Manual field flashing. The switch will bounce
back to OFF position automatically when it is released
SECTION 7 : OVER TEMPERATURE PROTECTION
EA200A built-in with two-stage temperature protection. When the heat sink temperature is higher than 100˚C, the
overheat alarm contact for OVER TEMP. ALARM will be closed, and the overheat alarm indicator on the panel will
light up; when the heat sink temperature drops to 90°C and below, the overheat alarm contact and alarm indicator
will automatically reset.
When the heat sink temperature is higher than 130˚C, the field output will be forcibly stopped, and the overheating
shutdown contact for OVER TEMP. SHUTDOWN will be closed and the overheating shutdown indicator on the panel
will light up; When the heat sink temperature is below 120˚C, the shutdown contact and indicator will automatically
reset.
SECTION 8 : EXTERNAL EMERGENCY STOP POWER GENERATION
EA200A built-in with external emergency stop function, when EMERGENCY SHUTDOWN terminal is shorted, the
AVR will terminated excitation field output. Until the EMERGENCY SHUTDOWN terminal is opened, the AVR will
resume output to field.
EA200A built-in with EB500 Auto Flash Module. When Generator residual voltage is
lower than Build Up Voltage, the EA200A will automatically supply 24Vdc to Magnetic
field then establishes AC voltage by following below setting.
ATTENTION
※All the power of EA200A protection system were supplied by 24Vdc, the B+ and B- terminal must be
connected correctly, otherwise all the protection, Self-Excited, and the Field Current meter cannot be
used.
ATTENTION
※EB500 terminal B- cannot be grounded when Generator Neutral is grounded, which may damage the
application.
※Automatic / Manual excitation current, please refer to chapter 5.4 for adjustment.
※FIELD Switch factory preset is at OFF position.
FLASH
AUTO OFF MANU
Figure 12.
Figure 13

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EA200A 15
SECTION 9 : WIRRING DIAGRAM
F+ F- AC1 AC2 S1 S2 C1 C2
CT N:5A
B+ B- OIL OIL VR1 VR2 A1 A2
FIELD
OUTPUT POWER INPUT SENSING INPUT
BATTER
INPUT OIL SWITCH EXT. VR ANALOG INPUT
CT
INPUT
BATTER
+-
EXT. VOLTS
Adjust 1K Ω
High oil
pressure SW
shielded
0~+/-5VDC
Isolated power
> 0.5 VA
wire
FIELD U
V
W
N
EA200A
F+ F- AC1 AC2 S1 S2 C1 C2
CT N:5A U
V
W
N
B+ B- OIL OIL VR1 VR2 A1 A2
FIELD
OUTPUT POWER INPUT SENSING INPUT
BATTER
INPUT OIL SWITCH EXT. VR ANALOG INPUT
CT
INPUT
BATTER
+-
EXT. VOLTS
Adjust 1K Ω
High oil
pressure SW
shielded
0~+/-5VDC
Isolated power
> 0.5 VA
wire
FIELD
AUXILIARY WINDING
EA200A
Figure 14 220 Vac
Figure 15 AUX Winding
F+ F- AC1 AC2 S1 S2 C1 C2
CT N:5A U
V
W
N
B+ B- OIL OIL VR1 VR2 A1 A2
FIELD
OUTPUT POWER INPUT SENSING INPUT
BATTER
INPUT OIL SWITCH EXT. VR ANALOG INPUT
CT
INPUT
BATTER
+-
EXT. VOLTS
Adjust 1K Ω
High oil
pressure SW
shielded
0~+/-5VDC
Isolated power
> 0.5 VA
wire
FIELD
EA200A
F+ F- AC1 AC2 S1 S2 C1 C2
B+ B- OIL OIL VR1 VR2 A1 A2
FIELD
OUTPUT POWER INPUT SENSING INPUT
BATTER
INPUT OIL SWITCH EXT. VR ANALOG INPUT
CT
INPUT
BATTER
+-
EXT. VOLTS
Adjust 1K Ω
High oil
pressure SW
shielded
0~+/-5VDC
Isolated power
> 0.5 VA
wire
CT N:5A U
V
W
N
FIELD
EA200A
Figure 16 380/440/480 Vac (N Phase)
Figure 17 380/440/480 Vac (YY connection)

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16 EA200A
SECTION 10 : TROUBLE SHOOTING
SYMPTOM
POSSIBLE CAUSES
SOLUTIONS
Voltage cannot
build up
Residual voltage below 5 Vac
1) Check if B+ and B- have 24Vdc power input
2) Check whether the wiring of the oil pressure switch is normal
3) Check whether the FLASH switch is at correct position
4) Set FLASH switch to Manual excitation to build up the voltage
F+ and F- reverse connection
Interchange the wiring of F+ and F-
Engine under speed
Increase engine speed to above 25 Hz
Carbon brushes were worn out
Replace with new carbon brushes
AVR heat sink is over
temperature
1) Make sure the installation environment has good ventilation
2) Check whether the fan operates normally (when generator is
running and output voltage is normal)
External emergency stop
terminals closed
Open external emergency stop terminals
Voltage output
is too low
Incorrect voltage selection for
sensing power transformer
Select the correct voltage setting for sensing power transformer
Under Frequency Protection is
activated
Select the correct system frequency or increase the generator
frequency to the rated speed
Voltage set point of EA45AF is
too low
Adjust the VOLT knob clockwise to make the voltage reach rated
value
External voltage adjustment set
point is too low
Adjust the external voltage knob to middle position
The external voltage adjustment
knob is abnormal
Replace the external voltage adjustment knob.
Incorrect setting for Half Wave /
Full Wave output.
Select the correct output voltage (Full Wave must be selected
when excitation voltage in full-load is greater than 60Vdc)
AVR heat sink is over
temperature
1) Make sure the installation environment has good ventilation
2) Check whether the fan operates normally (when it can
generate power normally)
External emergency stop
terminals closed
Open External emergency stop terminals
Voltage output
is too high
Incorrect voltage selection for
sensing power transformer
Select the correct voltage setting for sensing power transformer
Voltage set point of EA45AF is
too high
Adjust the VOLT knob counterclockwise to make the voltage
reach rated value
Voltage output
is unstable
(Hunting)
Stability set point is not match
Generator properly
Please refer to chapter 5.2.1 for Stability adjustment
Under Frequency Protection is
activated
The setting value of Under Frequency Protection is too close to
the knee point.
Please refer to chapter 5.2.2 for Under Frequency adjustment
Incorrect setting for Half Wave /
Full Wave output.
Select the correct output voltage (Half Wave must be selected
when excitation voltage in full-load is lower than 30Vdc)
Field resistance or field voltage
is too low. (Excitation voltage is
lower than 5Vdc when No-load)
Connect suitable resistor in series to increase total resistance
Cooling Fan is
no action
Incorrect voltage selection on
FAN VOLT transformer
Select correct Fan voltage on FAN VOLT transformer
The fan is stuck
Clean or replace the fan
※Appearance and specifications of products are subject to change for improvement without prior notice.

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EA200A 17
SECTION 11 : APPENDIX
11.1 EA200A Internal drawing
EB500EA45C R1 R2 R3 F1
EP4-1
PT3
H3 TEMP
SW1 TEMP SW2
D2 D3 D1
HALL
H2 H1
SCR1SCR2
NFB
TB2
A1
A2
C1
C2
S1
S2
VR1
VR2
B+
B-
TB3
277V
245V
220V
190V
COM1
480V
440V
380V
220V
110V
COM2
TB5
FAN VOLT
SENSING VOLT
7
8
9
10
AC1
11
12
13
14
15
S2
TB5
VR1
VR2
G1
G21
S1
CU1
CU2
-15
+15
B+
B-
B1+
B2+
B3+
B4+
F+
F-
EA+
EA-
AC2
TB4
TB1 F+F- AC2 AC1

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18 EA200A
90.6
45
45
68.1 90.6 94.6
56.6
18
39.5 7
11.2 EP4-1 Operation manual
EP4-1
DIGITAL VOLTAGE
PROTECTIVE RELAY
User's Manual
RESTRICTIONS ON USE
When using this product in applications
that require particular safety or when
using this product in important facilities,
please pay attention to the safety of the
overall system and equipment. Install fail-
safe mechanisms, perform redundancy
checks and periodic inspections and
adopt other appropriate safety measures
when it is necessary. This product is
rated at Class Ⅱ.
SPECIFICATIONS
NAMES AND FUNCTIONS OF FACEPLATE
Operating voltage
AC/DC : 100 - 240V, DC : 8 - 60V(for EP4-11060- only)
EP4-1
L2
L3 S
VL1
Over
Test
Unbal. Auto
ff
5S
1S
Rev.
Voltage Time
Under Over Under
Reset
Voltage indicatior
Over voltage
tripping delay
Time indicatior
in second
Undervoltage
trippingdelay
Function settings
Manual reset
Display
Under voltage setting
Phase sequence
Setting values display
Over voltage setting
Allowable operating
voltage range
85 ~ 110% of rated operating voltage
Rated frequency
50 / 60 Hz
Contact rating
250VAC 5A (Resistive load)
Display error
±1%(at 550V)
Power consumption
Approx. 3.3VA
Life
Mechanical : 5,000,000 times / Electrical : 100,000 times
Ambient temperature
-10 ~ +50 ºC (without condensation & freezing)
Ambient humidity
MAX 85% RH (without condensation)
Altitude
MAX 2000m
Weight
Approx. 130g
SETTING PROCEDURE
DISPLAY
REV. ON
OFF
ON
OFF
ON
OFF
ON
OFF
UNBAL.
5S/1S
AUTO
Auto
Off
5S
1S
Unbal.
Rev.
Over Under
Volt
Over Under
Volt
Under
Over
Over
Time
Under
Time
NO INPUT
DIMENSIONS
SAFETY PRECAUTION
This manual uses the following symbols to ensure safe operation of this product.
WARNING
Warnings are indicated when mishandling this product might result in death or serious injury to user.
CAUTION
Cautions are indicated when mishandling this product might result in minor injury to the user, or only
physical damage to the timer.
WARNING
‧Note this incorrect wiring of this product can damage it and lead to other hazards. Make sure the product has
been correctly wired before turning the power ON.
‧Before wiring, or removing / mounting the product, be sure to turn the power OFF. Failure to do so might cause
electric shock.
‧Do not touch electrically charged parts such as the power terminals. Doing so might cause electric shock.
‧Do not disassemble the product. Doing so might cause electric shock or faulty operation.
CAUTION
‧Use the product within the operating ranges recommended in the specification (temperature, humidity,
voltage,shock, mounting direction, atmosphere and etc.). Failure to do so might cause fire or faulty operation.
‧Firmly tighten the wires to the terminal. Insufficient tightening of the wires to the terminal might cause fire.

___________________________________________________________________________________________
EA200A 19
CONNECTION
TYPE SELECTION
Voltage type
DC Type
Single Phase
3 Phase 3 Wire
3 Phase 4 Wire
EP4-11----
EP4-12----
EP4-13----
EP4-14----
Voltage
detect range
8~60V
EP4-11060-
N/A
N/A
N/A
50~200V
EP4-11200-
N/A
N/A
N/A
70~150V
EP4-11150-
EP4-12150-
EP4-13150-
N/A
160~300V
EP4-11300-
EP4-12300-
EP4-13300-
EP4-14300-
270~550V
N/A
EP4-12550-
EP4-13550-
EP4-14550-
Output contact
1C No-Fault
1C Fault
2C Over & Under Fault
EP4-1 ----- 1
EP4-1 -----2
EP4-1 ---- 3
2C Inst. & No-Fault
2C No-Fault
2C Over & Under No-Fault
EP4-1 ----- 4
EP4-1 -----5
EP4-1 ---- 6
TIMING CHART
Under Voltage
Over Voltage
Line Norm al
Under Voltage
Phase Loss
Over Voltage
Over TimeReset TimeReset Time Reset Time Reset TimeReset Time ReverseTime Reset Time
UnbalanceTime
Under Time Phase-LossTime
>±5%
A1-A2
N.C. (15-16,25-26)
(25-28)
L1L2L3 L2L1L3 L1L2L3
N.O.(25-26)
(25-28)
N.C.
N.O.
N.C. (25-26)
(25-28)
(25-26)
No-Fault
N.O. (15-18)
UnderN.C. (15-16)
Fault
N.O. (15-18)
N.O. (15-18)
N.C. (15-16)
N.C. (15-16)
Under
No-Fault
N.O.
Over N.C.
No-Fault
Over
Fault
Inst.
Fault
N.O. (15-18,25-28)
DC Voltage
1-Phase 2-Wire
3-Phase 3-Wire
3-Phase 4-Wire
DC Voltage(8-60V)

___________________________________________________________________________________________
20 EA200A
11.3 Internal wiring diagram
TB4-D7
TB4-U3
TB4-D8
TB4-U4
TB4-U2
TB4-U1
TB4-D9
TB4-D10
TB3-4 TB3-2 TB3-3 TB3-1 TB3-7 TB3-8
Sensing Transformer
0 V
110V
220V
380V
440V 480V
Fan Transformer
0 V
190V 220V 245V 277V
TB5-6 TB5-7 TB5-8 TB5-9
TB5-10
TB3-6 TB3-5
V
TB5-11
TB4-U5
EA45C
440V 0V
C2 C1 A2 A1
220V
380V
+
-
TB1-2 TB1-1
+
-
26435
J2
J2
7
Hz
Hz
VR
VR
EA45AF-2
AC2
AC1
F+
F-
B+
B-
V
TB3-9 TB2-7 TB2-8
TB3-10
TB4-D6
TB4-D5
Voltage Meter
Generator
Auto
Manu
Off
Field Voltage Meter
Generator
TB4-D1
TB2-9
TB2-10
TB2-6 TB2-5 TB2-4 TB2-3 TB2-2 TB2-1
-
+
EP4-1
TB4-D4
TEMP SW2(H3) TEMP SW1(H3)
120 OFF 130 ON
90 OFF 100 ON TB4-D3
TB4-D2
R3
R1
L1
R2
L2
FAN 220V
TB5-1 TB5-2 TB5-3 TB5-4
TB4-D11
TB5-5
+VO
COM
-VO
-VIN
+VIN
0/1 Converter
DC/DC
EB500
R1 R2
R3
R2
R2
R2 R2
R3 R3
R3
SCR1
H1 H2
H3
SCR2
D1 D2 D3
Hall current sensor
F1 250V 10A
TB4-U9 TB4-U6 TB4-U8
TB4-U6 TB4-U7 TB4-U8 TB4-U9
M
-
+
0
AC 1 AC 2
SW3
full / half waxe
SW2 50/60Hz
SW1 FLASH SELECT A
5 6 1 2 3 4
B5+
B+
B3+
B+
BA+
B-
S2 S1
C2 C1
A2 A1
VR2 VR1
13 12 11 14 15
S1
+15
CU1
-15
B2+ B1+
B4+
B-
EA+
EA-
G12 G23
G22
G11
F+
AC2
AC1
F+
G1
AC1
F-
AC2
G21
VR2
VR1
H1
H2
G2
J2
J21
G21
F+
PT3
F-
B+
7 8 9
10
AC2
B-
CU1 CU2
-15
+15
Field Current Meter
Generator
F+ G1 AC1 F- AC2
PT1
PT2
G2
-
+
-+
F+ F-