30030 Datasheet, PDF (11/12 Pages) Tyco Electronics – 240 Series DIN Panel Meters

INSTALLATION INSTRUCTIONS
Page 1 of 2
Ref: IWYSNC – Rev 6 – Sept 02
Products Covered
Model Description
244-14A) Single Phase or 3 phase 3/4 Wire LED
077-14A) - synchroscope
244-14L) Single Phase or 3 phase 3/4 wire LED
077-14L) - Synchroscope and Synchro check relay
244-14G) 244-14L with voltage difference input range
244-14H 244-14D with voltage difference input range
244-14D) Single phase or 3-phase 3/4 wire LED
077-14D) - Synchroscope and Synchro check relay with
deadbus
Introduction
244 models may be mounted in a panel of any thickness up
to a maximum of 12mm. Mounting is by two clamps and
thumbscrews.
077 Models may be mounted in a panel thickness up to a
maximum of 8mm (5/16”). Mounting is by 4 x 1/4 - 28 UNF
studs and nuts.
For all models consideration should be given to the space
required behind the units to allow for bends in the
connecting cables. Additional protection to the panel may
be obtained by the use of an optional gasket. The terminals
at the rear of the case should be protected from liquids.
Units should be mounted in a reasonably stable ambient
temperature and in any event where the temperature is
within the range 0-60 ºC.
The unit should not be mounted where it is subjected to
excessive direct sunlight; vibration should be kept to a
minimum. Connection wires should be sized to comply to
local regulations and should be terminated in tags suitable
for the crew connections provided, labels are fixed to the
units and carry full connection information and data including
type number, input voltage, current, frequency and supply as
appropriate. The products do not have internal fuses
therefore external fuses must be used for safety protection
under fault conditions.
Fusing and connections
1. This unit must be fitted with external fuses in voltage
supply lines.
2. Voltage input lines must be fused with a quick blow
fuse 1A maximum.
3. Choose fuses of a type and with a breaking capacity
appropriate to the supply and in accordance with local
regulations.
Warning
• During normal operation, voltages hazardous to life may
be present at some of the terminals of this unit.
Installation and servicing should be performed only by
qualified, properly trained personnel' abiding by local
regulations. Ensure all supplies are de-energised
before attempting connection or other procedures.
Analogue Instruments
DIN Instruments 240 Series & ANSI
Switchboard Meters 070 Series
LED Synchroscope & Synchrocheck
Relay with Dead Bus
• It is recommended adjustments be made with the
supplies de-energised, but if this is not possible, then
extreme caution should be exercised.
• Terminals should not be user accessible after
installation and external installation provisions must be
sufficient to prevent hazards under fault conditions.
• This unit is not intended to function as part of a system
providing the sole means of fault protection - good
engineering practice dictates that any critical function be
protected by at least two independent and diverse
means.
Screw torque
Main terminal screws should be tightened to 1.35Nm or 1.0
ft/lbf only. Detachable terminal connector screws should be
tightened to 0.9Nm or 0.7 ft/lbf only. Where fitted, terminal
covers are held in place by miniature self tapping screws
into plastic. These screws should be tightened by hand
only, sufficiently to secure the terminal cover and prevent it
vibrating.
Electromagnetic Compatibility
This unit has been designed to provide protection against
EM (electro-magnetic) interference in line with requirements
of EU and other regulations. Precautions necessary to
provide proper operation of this and adjacent equipment will
be installation dependent and so the following can only be
general guidance:-
• Avoid routing wiring to this unit alongside cables and
products that are, or could be, a source of interference.
• The auxiliary supply to the unit should not be subject to
excessive interference. In some cases, a supply line
filter may be required.
• To protect the product against incorrect operation or
permanent damage, surge transients must be
controlled. It is good EMC practice to suppress
differential surges to 2kV or less at the source. The unit
has been designed to automatically recover from typical
transients, however in extreme circumstances it may be
necessary to temporarily disconnect the auxiliary supply
for a period of greater than 5 seconds to restore correct
operation.
• Screened communication and small signal leads are
recommended and may be required. These and other
connecting leads may require the fitting of RF
suppression components, such as ferrite absorbers, line
filters etc., if RF fields cause problems.
It is good practice to install sensitive electronic instruments
that are performing critical functions in EMC enclosures that
protect against electrical interference causing a disturbance
in function.