Eurotherm EFit Manuale utente
User Guide
Power Controller
HA031980ENG issue 1
February 2014
EFit
Thyristor power controllers
EFit Series
For the control of heating elements up to 25 Kw
User Manual
Before installation, please read this manual thoroughly.
Eurotherm cannot be held responsible for any damage to persons
or property, or for any financial loss or costs arising from incorrect
use of the product or failure to observe the instructions given in
this manual.
In order to maintain its ‘leading edge’ Eurotherm may have to
make changes to its specifications without advance notice.
For any further information, or if in doubt, please contact Invensys
Eurotherm, where qualified staff are available to advise or assist
you with the commissioning of your installation.
Guarantee
Two years parts and labour garantee
EFit User Manual
Contents List
1. Safety notes
1.1 Warnings
1.2 SELV
1.3 Symbols used on the instrument labeling
2. Technical specifications
3. Codification
3.1 Ordering code
3.2 Fuses
4. Mechanical installation
4.1 Dimensional details
4.2 Front fascia
5. Electrical Installation
5.1 Terminals and connectors
5.2 Connector view
5.2.1 View on lower face
5.2.2 View on upper face
6. Control wiring
6.1 Input signal wiring
6.1.1 Remote Control
6.1.2 Local control by potentiometer
6.1.3 Local control by contacts
6.2 Auxiliary power supply (option)
7. Current limit option
7.1 Operations
7.2 Adjustment
EFit User Manuali
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EFit User Manual
8. Thyristors firing modes
8.1 Fast cycle
8.2 Single-cycle
8.3 Advanced Single-cycle
8.4 Phase angle
9. Power control
9.1 Description
9.2 Compensation of power supply fluctuations
10. Current derating
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EFit User Manual
1. SAFETY NOTES
1.1 WARNING
BRANCH-CIRCUIT PROTECTION
AND SAFETY OVERLOAD PROTECTION
This product does not contain any branch-circuit protection or
internal safety overload protection. It is the responsibility of the
user to add branch-circuit protection upstream of the unit. It is
also the responsibility of the user to provide external or remote
safety overload protection to the end installation.
Such branch-circuit and safety overload protection must comply
with applicable local regulations.
UL: The above mentioned branch-circuit protection is necessary
for compliance with National Electric Code (NEC) requirements.
If opening of the branch circuit protective or the supplemental fuses
(high speed fuse) EFit shall be examined and replaced if damaged.
It is strongly recommended that the installing authority includes
independent, system-safety mechanisms to protect both
personnel and equipment against injury or damage, and that
such safety mechanisms be regularly inspected and maintained.
Consult the EFit supplier for advice.
The instrument shall have one of the following as a disconnecting
device, fitted within easy reach of the operator, and labelled as
the disconnecting device.
a. A branch-circuit protection (circuit breaker or fuse which
complies with the requirements of IEC60947-1).
b. A separable coupler which can be disconnected without the
use of a tool.
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EFit User Manual
1. Any interruption of the protective conductor outside the
equipment, or disconnection of the protective earth terminal is
likely to make the device dangerous under some fault conditions.
Intentional interruption is prohibited.
2. Before carrying out any wiring to the unit it must be ensured that
all relevant power and control cables, leads or harnesses are isolated
from voltage sources. Wire conductor cross sections must comply
with table 9 of IEC60947-1 (or NEC, Article 310 Table 310-16).
3. This equipment is not suitable for isolation applications, within
the meaning of IEC60947-1.
4. The heatsink becomes hot whilst the unit is running, and it can take
up to 15 minutes to cool after the unit is shut down. The heatsink
temperature may rise above 50 degrees Celsius. If operators are
likely to come into contact with such heatsinks, adequate warnings
and barriers must be put in place in order to prevent injury.
Before any other connection is made, the protective earth terminal
shall be connected to a protective conductor by a listed ring crimp.
Whenever it is likely that protection has been impaired, the
unit shall be made inoperative, and secured against accidental
operation. The manufacturer’s nearest service centre should be
contacted for advice.
Any adjustment, maintenance and repair of the opened apparatus
under voltage, is forbidden for safety reasons.
Units are designed to be installed in a cabinet connected to the
protective earth according to IEC60364-1 and IEC60364-5-54 or
applicable national standards. The cabinet must be closed under
normal operating conditions. Adequate air conditioning/ filtering/
cooling equipment must be fitted to the cabinet in order to prevent
the ingress of conductive pollution, the formation of condensation etc.
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EFit User Manual
5. Units are designed to be mounted vertically. There must be
no obstructions (above or below) which could reduce or hamper
airflow. If more than one set of units is located in the same
cabinet, they must be mounted in such a way that air from one
unit is not drawn into another.
6. Signal and power voltage wiring must be kept separate from
one another. Where this is impractical, shielded cables should be
used for the signal wiring.
7. If the equipment is used in a manner not specified by the
manufacturer, the protection provided by the equipment might
be impaired.
8. This product has been designed for environment A (Industrial).
Use of this product in environment B (domestic, commercial
and light industrial) may cause unwanted electromagnetic
disturbances in which cases the user may be required to take
adequate mitigation measures.
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EFit User Manual
1.2 SELV
Safety Extra Low Voltage. This is defined (in IEC60947-1) as an
electrical circuit in which the voltage cannot exceed ‘ELV’ under
normal conditions or under single fault conditions, including
earth faults in other circuits. The definition of ELV is complex as it
depends on environment, signal frequency etc. See IEC 61140 for
further details. The input connector (pin 5 to 7) is compliant to the
SELV requirements.
1.3 SYMBOLS USED IN THE INSTRUMENT LABELING
One or more of the symbols below may appear as a part of the
instrument labeling.
!
Protective conductor terminal
AC supply only
Underwriters Laboratories listed
mark for Canada and the US
Risk of electric shock
Refer to the manual for instructions
Precautions against static electrical discharge
must be taken when handling this unit
Do not touch Heatsink
Hot Surface
Declaration of conformity
to European standard
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