Hitachi H Series - User Manual

MAGNETIC
CONTACTOR/STARTER
Instruction Manual
(S-11-017-C) ⑰
Introduction
This instruction manual is related to installation, wiring using and maintenance of Contactor/Starter.
Notes of Safety
Before using this Contactor/Starter, you should first throughly read this manual, in order to
understand appropriate usage and handling.
● Don’t touch electric connecting terminal, or you should be damaged by electric-shock.
● Check the wire is anenergized at the time of maintenance, or you should be damaged by electric-
shock.
● Make sure of clearance written by this manual at the time of installation, or you should be damaged
by electric-shock.
● Tighten screws by appropriate tightening torque, or there is in danger of fire.
1．Before installation
Before installation, be sure whether Type, Rating current, Coil voltage, Frequency marked on the
name plate are agreed with ordered specifications and whether there are no fallen off parts or any
damaged portions.
2．Installation
At the time of installation, secure appropriate space shown by this manual.
The Contactor / Starter must be secured on an upright panel or wall arranged to prevent from
excessive dust, oil-mist and vibration so that the line end of contactor becomes top.
3．Wiring
Wiring must be used appropriate size of electric wire, and tighten appropriate tightening torque
shown by this manual.
Table1 clearances at installation
！
DANGER
！
CAUTION
Frame
Clearance (minimum : mm)
Mounting space
H series
HS series
RH series
A
B
C
D
E
C
A
B
Metal or ground
D
E
insulator
Metal or ground
Magnetic
Contactor
dimension
of switch
C
A
B
Metal or ground
D
E
insulator
Metal or ground
Magnetic
Starter
dimension
of switch
XS4
5
10
0
10
0
8～50
5
15
5
10
5
65C
25N, 50N
※ 1
15
5
10
5
80C～150C
60N, 120N
※ 1
15
10
10
10
200C,250C
200N
※ 1
25
10
10
10
300C,400C
※ 1
30
10
10
10
600C,800C
※ 1
50
10
10
10
Note : ※ is allowed for 0. In case of separate mounting for Thermal Relay…A:10 B:15 C:5 D:15 E:5
Send to end-user this
instruction manual
certainly.

Summary

Magnetic Contactor;Starter Instruction Manual

Introduction and Safety

Overview of the manual's scope and critical safety warnings (DANGER, CAUTION).

Installation and Wiring Guidelines

Procedures for installation, clearance requirements, and wiring best practices.

Using and Maintenance

Using Conditions and Precautions

Details normal service conditions, environmental factors, and operational precautions.

Maintenance Procedures

Steps for checking tightness, foreign substances, abnormal operation, and contact wear.

Overview

1. Function Description
2. Important Technical Specifications
3. Usage Features
4. Maintenance Features

This document describes the Hitachi Magnetic Contactor/Starter, an electrical device used for controlling and protecting electrical circuits, particularly those involving motors. The manual provides essential information regarding its installation, wiring, usage, and maintenance to ensure safe and appropriate handling.

Function Description

The Hitachi Magnetic Contactor/Starter is designed to switch electrical circuits on and off, often for controlling motors. It integrates a contactor for switching and, when combined with a thermal overload relay, provides protection against overcurrents. The device ensures that electrical circuits are safely connected and disconnected, and it helps prevent damage to motors and other equipment due to excessive current.

Important Technical Specifications

The manual provides detailed specifications for various models within the H, HS, and RH series, covering different frame sizes and associated thermal relays (1E, 2E).

Clearances at Installation (minimum: mm):

H series	HS series	RH series	A	B	C	D	E
XS4			5	10	0	10	0
8~50			5	15	5	10	5
65C		25N, 50N	※1	15	5	10	5
80C~150C		60N, 120N	※1	15	10	10	10
200C,250C		200N	※1	25	10	10	10
300C,400C			※1	30	10	10	10
600C,800C			※1	50	10	10	10

Note: "※1" indicates that a clearance of 0 is allowed. In case of separate mounting for Thermal Relay, clearances are A:10, B:15, C:5, D:15, E:5.

Wire Size and Tightening Torque:

The manual specifies screw sizes, maximum wire sizes (mm²), maximum width of solderless terminals (mm), and appropriate tightening torque (N·m) for main circuit terminals, auxiliary, and coil terminals, and auxiliary terminals of the relay.

Main Circuit Terminals:

Frame (Contactor)	Thermal Relay	Screw size	Max. wire size (mm²)	Max. width of solderless terminal (mm)	Appropriate tightening torque (N·m)
XS4, 8, 10	12B	M3.5	2 (φ1.6)	7.8	0.8~1.0
20	20B	M4	3.5 (φ2)	9	1.2~1.5
25		M4	3.5 (φ2)	10.5	1.2~1.5
	25B	M5	8 (φ2.6)	10	2.5~3.5
	50B	M5	14	13.0	2.5~3.5
35, 50		M5	14	13.9	2.5~3.5
	25N	M5	22	16.5	2.5~3.5
65C	50N	80B	M6	22	16.5
80C	60N		M6	60	22
100C, 125C		150B	M8 Bolt	60	22
150C	120N		M8 Bolt	80	27
	200N		M8 Bolt	150	37
200C, 250C	400B (RC240A or lower)	M10 Bolt	150	37	15~25
300C, 400C	400B (RC240A upper)	M12 Bolt	200	44	35~45
600C		M12 Bolt	325	55	35~45
800C		M16 Bolt	325	55	35~45

Auxiliary and Coil Terminals:

Frame (Contactor)	Thermal Relay	Screw size	Max. wire size (mm²)	Max. width of solderless terminal (mm)	Appropriate tightening torque (N·m)
8C~400C	XS4~50	25N~200N	M3.5	2 (φ1.6)	7.8
600C, 800C			aux.: M4	3.5 (φ2)	9
			coil: M3.5	2 (φ1.6)	7.8

Auxiliary Terminal of Relay:

Frame (Contactor)	Thermal Relay	Screw size	Max. wire size (mm²)	Max. width of solderless terminal (mm)	Appropriate tightening torque (N·m)
8C~600C	XS4~50	12B~400B	M3.5	2 (φ1.6)	7.8

Note: Terminal screw sizes may vary between Contactor and Thermal Relay, even if they appear to be the same size. Care must be taken not to interchange screws during wiring, as improper screws can lead to insufficient tightening and potential damage.

Usage Features

Normal Service Conditions:

• Ambient temperature: -5°C to 40°C (usable up to 50°C without enclosure). HS series is rated for 55°C.
• Relative humidity: 45% to 85%.
• Altitude: 2,000m or lower.
• Atmosphere: Must be free from corrosive gas, combustible gas, dust, vapor, salt, etc.

Safety Precautions:

• DANGER:
  • Do not touch electric connecting terminals to avoid electric shock.
  • Ensure the wire is de-energized during maintenance to prevent electric shock.
• CAUTION:
  • Maintain specified clearances during installation to prevent electric shock.
  • Tighten screws to the appropriate torque to prevent fire hazards.
• Before installation, verify that the Type, Rating current, Coil voltage, and Frequency marked on the nameplate match the ordered specifications. Also, check for any missing or damaged parts.
• Install the Contactor/Starter on an upright panel or wall, positioned to minimize exposure to dust, oil-mist, and vibration. The line end of the contactor should be at the top.
• Use appropriately sized electric wire and tighten connections to the specified torque.
• Do not operate the contactor with the cover open, or short-circuit it.
• For reversible type applications, an electrical interlock is required.
• A metallic case must be connected to the earth.
• For thermal overload relays, adjust the setting current to match the motor's rating using the current adjusting knob. Do not over-turn the knob.

Maintenance Features

Regular maintenance is crucial for the reliable operation and longevity of the Hitachi Magnetic Contactor/Starter.

Key Maintenance Checks:

• Screw Tightness: Periodically check all screws for tightness. Re-tighten any loose screws to the specified torque.
• Foreign Substances: Inspect the contactor for any foreign substances such as washers, wire waste, or dust that may have infiltrated the device. Remove any such debris.
• Operational Checks (during trial running):
  • Listen for abnormal noise.
  • Detect any abnormal smell.
  • Observe for abnormal arcing.
• Contact Wear: After loosening screws and removing the cover, check contacts for abnormal wear.
• Cleanliness: Eliminate any dropped foreign substances, dust, or chips from all parts of the device.
• Core Maintenance: Do not apply oil to the cores of the contactor.
• Contact Blackening: Some blackening of contacts is normal and does not indicate a problem.
• Contact Replacement: If only one contact of a three-phase system shows wear, all contacts for all phases must be replaced simultaneously.
• De-energize Before Replacement: Always ensure the wire is de-energized before replacing contacts.
• Post-Replacement Cleaning: After removing worn contacts, eliminate any dust generated from them.

Thermal Relay Specifics:

The thermal relay features an "Adjusting knob" for setting the current and a "Test trip lever" for verifying its functionality. It also includes a "Reset button" that allows resetting without opening the cover, enhancing convenience and safety during operation.

Hitachi H Series Specifications