Hitachi HC Series User manual

(S-11-071-A) 71
Introduction
This instruction manual is related to installation, wiring using and maintenance of Contactor/Starter.
■Warranty period and contents
This Magnetic Contactor warranty period is one year after bought. If the items is broken by our
company's responsibility, we change broken parts or repair it for free.
Even during warranty period, fee occurs in case of following.
(1) Failure by inappropriate handling, using, and remodeling or repair other than our company.
(2) Failure which are cause by other than our products, for example, external factor by the broken
majeure and natural disasters.
“Warranty” means about we guarantee our products. Other damage induced by the broken items,
which is out of warranty for our company.
Notes of Safety
Before using this Contactor/Starter, you should first thoroughly read this manual, to understand
appropriate usage and handling.
DANGER
●Don’t touch or come near when turn ON the power. Can cause burns or electric-shock.
●Inspect the energized parts of the main circuit regularly. Can cause burns or fire.
●Turn off power when maintenance. Can cause electric-shock.
1. Before installation
Before installation, be sure whether type, rated current, coil voltage and, frequency marked on the name
plate is agreed with ordered specifications and whether there are no fallen off parts or any damaged portions.
2. Installation and wiring
At the time of installation, secure appropriate space shown by Table1.
Wiring must tighten appropriate tightening torque shown by Table2.
Table1. Clearance at installation
CAUTION
●At the time of Installation, line side of contactor install the line side up a vertical panel or wall where
dust, moisture and vibration are small, and secure the space specified in the instruction manual. Can
cause burns or fire.
●Use a wire size suitable for the applied voltage and energized current and tighten the wiring with the
tightening torque specified in the instruction manual. Can cause fire.
MAGNETIC CONTACTOR
HC series
Instruction Manual
Frame
Clearance（minimum : mm）
Mounting space
Contactor
Contactor
Relay
A
B
C
D
D
C
A
B
HC8M(-T)
HC10M(-T)
XC4M
5
15
2
10
HC8(-T)
HC10(-T)
XC4
5
15
2
10
HC20(-T)
5
15
2
10
HC35(-T)
5
15
4
10
HC55(-T)
5
15
4
10
Mounting unit of Thermal Relay(TRC□)
5
15
5
10
Send to end-user this
instruction manual certainly.
Metal or ground
Dimension
of switch
Metal or ground

Table2. Wire size and tightening torque
Terminal
Type
Model
Screw
size
Apply wire
Max.
width of
solderless
terminal
(mm)
Recommended
torque
(N･m)
AWG
Stranded
wire (mm2)
Contactor
Contactor
Relay
All
XC4M,HC8M,HC10M
M3.5
18～12
1.25～2
7.6
1.1
Main
Contact
HC8
M3.5
18～10
1～6
7.6
1.1
HC10
M3.5
16～10
1.5～10
7.6
1.1
HC20
M4
14～8
2.5～10
9.6
2.2
HC35
M5
12～8
2.5～10
12.8
2.9
HC55
M6
10～4
6～25
14
4.0
Aux.
Contact
XC4,HC8～HC20
M3.5
18～12
0.75～2.5
7.6
1.1
HC35,HC55
(※1)
18～12
0.75～2.5
7.6
1.1
Coil
XC4,HC8～HC55
(※1)
18～12
0.75～2.5
7.6
1.1
Thermal
Relay
All
TRC12M
M3.5
18～12
1.25～2
7.6
1.1
Main
Contact
TRC12
M3.5
24～10
1.25～2
7.6
1.1
TRC32(～RC27A)
M4
18～8
1～6
12
1.1 (※2)
TRC32(RC34A)
M5
18～8
6～10
12
2.2 (※2)
TRC63
M6
18～6
10～16
15
3.9
Aux.
Contact
TRC12
M3.5
18
1
7.6
1.1
TRC32,TRC63
M3.5
18
1
7.6
0.9
・(※1) The screw size is M4, but the diameter of the crimp terminal penetration part is about φ2.3 mm,
so M3 and M3.5 crimp terminals can be used.
・(※2) The proper tightening torque of the main terminal (UZ-32) when use the mounting unit is 1.6 (N・m).
・There is a hole for screw tightening in the cover of the terminal part, but some terminals,such as auxiliary
contact terminals, cannot penetrate the hole with a screwdriver with a large shaft diameter and cannot be
tightened. The wiring work remove the terminal cover, or use a thin diameter shaft screwdriver.
(φ5.5 or less recommended).
・When wiring using round crimp terminals, it is necessary to remove the cover of the terminal part to
remove the screw from the main body once. The economy Magnetic Contactor has an integrated
structure between the main body cover and the terminal cover, and it is difficult to remove the cover,
so we will deliver it with the cover removed. When using a round crimp terminal, attach the cover after
the wiring work is completed.(Please refer to the technical manual)
■About coil terminal
The standard HC series has coil terminals in two places of one on the line side and one on the load side, and both
can be used. (Line side terminal and load side terminal can be used together) Since the pins with the same
terminal number between the line side and load side are electrically short-circuited, do not apply voltage between
A1-A1 and A2-A2. A short-circuit accident occurs. In order to prevent incorrect wiring, the coil terminal part on
the load side is protected by a lid, and the wiring cannot be done without removing the lid.
Line Table3. Coil terminal connectable position combinations
Load
■About screw
Screws are directional. Please pay attention to the mounting direction.
Installing screws in the wrong direction, may lead to abnormal
overheating of the terminals or, falling, or disconnection of the wiring.
A1
A2
A1
A2
A1
A2
A1
A2
A1
A2
A1
A2
Good
Good
Bad

3. Using
■Normal service condition
(1) Ambient temperature ：-5℃to 55℃(-5℃to 40℃in the case of DC operation type)
(2) Relative humidity ：45 to 85% (No condensation)
(3) Altitude ：2000m or lower
(4) Atmosphere ：Must be free from corrosive gas, combustible gas, dust, vapor, salt, oil-mist etc.
■Usage notes
(1) Don’t touch or approach the product while it is energized. There is a risk of electric-shock or burns.
(2) Don’t operation when the insulation cover is removed. There is a risk of short circuit.
(3) The Thermal Relay must set the motor's rated current by the adjusting knob, and use.
・The "・" near the number in the dial indicates the setting position of the median, minimum,
and maximum values. (Since individual adjustments are made, the position of "・" may vary.)
・Please note that the initial position of the adjusting knob varies depending on the specification.
(4) Don’t set Thermal Relay beyond the range of the scale indicated on the product. Doing so may
cause malfunction during overload or malfunction during no load. If it works frequently, be sure to
investigate and eliminate the cause.
(5) Connecting wire of Thermal Relay has a play to facilitate position adjustment when working in combination
with Contactors. Therefore, there are some models with variations in the initial position and line length,
but it is not bad.
■Thermal Relay Operating Instructions
TRC12,TRC12M TRC32,TRC63
・Adjusting knob ・Reset button(Manual/Automatic reset toggle button)
The "・" show the position that
the median, minimum, and
maximum value. The arrow
position set the rated current
of the motor.
Manual Reset Automatic Reset
・Trip and stop button(TRC32,TRC63)
・Stop operation (※)；
Push the button.
・Test operation (Trip)；
Open the top cover, and pull the button.
(※) This function allows the motor to be stopped in an emergency by pressing a button. The Normal
close contact leaves only while the button is pressed, but the Normal open contact doesn’t switch. For
details See Table4.
Table4. TRC32, TRC63 Auxiliary Terminal Behavior Diagram
Terminal No.
Normal
Stop
Trip / Test
Reset
95-96
(Normal close
contact)
97-98
(Normal open
contact)
①Adjusting knob
②Reset button
③Trip lever
During trip operation,
Protrudes forward.
During test operation,
pull put it out.
①Adjusting knob
②Trip and stop button
③Behavior display
(Change to orange in trip mode)
④Reset button

■Optional installation
(1) When applying the option, check the catalog and technical manual, etc. for the applicable
model and the number of installable models and use it correctly.
(2) Side-on type options of the standard HC series
(Auxiliary Relay unit CXS-2 and interlock unit UR-02)
when installing, Remove the lid of the groove next to
the main unit with a tool such as a flat-blade
screwdriver before installing. (See figure on the right.)
※The Auxiliary Relay unit can’t be installed on the
right side of the HC20. The groove on the right side
of the HC20 is dedicated to the interlock unit, so
remove the lid only when using the interlock unit. If
the Auxiliary Relay unit is accidentally installed on
the right side, it will be damaged during operation
and may cause a malfunction.
(3) The Auxiliary contact unit can be installed side-on and head-on at the same time, but please
note that the number of additional contacts is limited.
Table5. Auxiliary Relay unit maximum number of installations
(※)The HC35 and HC55 don’t have Auxiliary contacts on the main body, and there is one side-on
unit on each side as standard, making it 2NO+2NC. The maximum number of installations is 8
contacts, including the standard 2NO+2NC.
4. Maintenance
(1) Turn off power when maintenance. Can cause electric-shock.
(2) Check whether screw is fully tightened. If a loose, tighten more. Can cause heating.
(3) Check the insulation resistance between phases and ground. If it is degraded, replace the product.
(4) Check by manually operation that the Contactor is not got into foreign substance, such as a
washer and wire.
(5) Don’t disassemble Contactor and Thermal Relay. The contacts of Contactor other than
HC55 cannot be visually checked unless they are completely disassembled. Inspect the contact parts
only for electrical inspections such as continuity inspections and visual inspections near the contacts.
(6) Remove dirt and dust from each part. Be careful not to disconnect the contacts.
(7) During trial running, check whether there occurs abnormal noise, abnormal smell.
(8) For maintenance details, please refer to the instructions described in the technical manual.
5. Notes
Detailed handling information and installation procedures related to options are also described in
the technical manual. You can download it from the following, so please refer
to it as well. We are sorry, but the technical manual is only available in the
Japanese version.
（URL：https://www.hitachi-ies.co.jp/products/hdn/mgsw/download/index.html）
Economy model
Standard model
Model
XC4M, HC8M, HC10M
HC10M-GP
XC4,
HC8,HC10
HC20
HC35, HC55
(※)
Coil Type
AC
DC
DC
AC and DC
AC
DC
Side-on
Per side 1pcs
Per side 1pcs
Left side 1pcs
2pcs
each
side
1pcs
each
side
Head-on
1pcs
1pcs(Can’t be attached with latches )
Maximum
installations
4contacts
4contacts
2contacts
6contacts
NO：Max 3contacts
NC：Max 3contacts
6contacts
NO：Max 3contacts
NC：Max 3contacts
8contacts(※)
NO：Max 4contacts
NC：Max 4contacts