Hitachi H20-T User Manual

1
1. OUTLINE
1-1 TYPES OF STARTER, CONTACTOR AND THERMAL OVERLOAD RELAY
The types of starter, contactor and thermal overload relay are listed below.
Table 1. Applications and types
Starter Contactor Contactor relay Thermal overload
relay
Application
Start, stop and
control of motor.
Protection of motor
from burning due to
overload and
restriction.
Start, stop and
control of motor.
Used as starter in com-
bination with thermal
overload relay.
Used in operating
circuits of starter,
contactor , electromagnet
and solenoid valve, and
sequential control of
automatic operation,
etc.
Protection of motor
from overload,
restriction and
single phase failure.
Types ･ With enclosure Non-reversible type
Reversible type
･ Without enclosure Non-reversible type
Reversible type
･ With push-button (with enclosure)
･ With saturation reactor
･ With mechanical interlock
･ DC operated type Direct input coil type
Double-coil type
･ With latch
･ Standard type
･ With twin contact
･ With latch
･ DC operated type
･ 2-phase type
(1E thermal over-
load relay)
･ 3-phase type
(1E thermal over-
1oad relay)
･ For protection of
overload and single
phase failure
(2E thermal overload
relay)
･ With saturation
reactor
･ Quick response type
･ Quick response type
2E
1-2 STANDARDS FOR STARTER, CONTACTOR AND THERMAL OVERLOAD RELAY
The main standards for starter, contactor and thermal overload relay are as follows:
(1) General standards
Table 2. General standards
Name of
country
Name of standard Necessity of
approval
International IEC 60947-4-1 Low-voltage switchgear and control gear
- Part 4 : Contactors and motor-starters,
Section 1-Electromechanical contactors and motor-starters
None
J apan JIS C8201-4-1 Low-voltage switchgear and control gear
- Part 4 : Contactors and motor-starters,
Section 1-Electromechanical contactors and motor-starters
None

Hitachi H20-T Specifications

General

Brand	Hitachi
Model	H20-T
Category	Controller
Language	English