5A CURRENT
TRANSFORMER
General Specifications (all models)
Insulation Class
Frequency Range
Supplied Secondary
Max. Secondary Lead
Length
Rated Accuracy
Burden
UL FIle No.
CSA File No.
Weight
Leads
Basic Lightning Impulse Insulation Level (BIL): The insulation
strength referenced to the crest value of an impulse voltage-
waveform which rises to a crest value in 1.2 microseconds, then
drops to ½ the crest value in 50 microseconds.
TO AC LOAD
Figure 1. Typical Connections
OUTPUT
TB1
0-5A
600V, 10kV BIL full wave
50-400Hz
Flexible conductors, 24"
(61cm) 16AWG (1.8mm 2 ),
UL Style 1015, 105°C
See Table 1 and technical
note 5
See Table 1 and
technical note 6
See Table 1
E93779
LR89403
1.0 lbs. (454g)
A
B
(see technical notes)
ACA5-20PC-X-ACX
L1
AC POWER
SUPPLY
www.murata-ps.com
(CT) provide an isolated 0-5A output that can be used with DATEL’s ACA5 Series of digital
ammeters. Installation is straightforward: simply pass the load-carrying conductor through
the 5A CT’s primary window, and then route its secondary’s leads through the ACA5-amme-
ter’s built-in, low-burden, toroid sensor.
with primary voltages up to 600Vac, at line frequencies from 50 to 400Hz. Fourteen models
are available to enable accurate measurements from 50A through 2000A. When combined
with DATEL’s ACA5 Series ammeters, secondary lead-extensions may be used for those
applications where the CT cannot be installed in the immediate vicinity of the ammeter.
1. CT Precautions: In normal operation, a 5A current transformer’s secondary circuit
2. CT Connections and Grounding: Some applications require connecting one of the CT’s
3. Installation: CT’s must be installed in a manner that ensures no excessive stresses are
TECHNICAL NOTES
IMPORTANT! To ensure safe and reliable operation, Current Transformers and asso-
ciated equipment must be installed and serviced by qualified technical personnel.
Never open the CT’s secondary connections while the primary is energized. Open
CT secondary wiring can generate potentially lethal voltages when the primary cir-
cuit is energized. Contact DATEL if you have any doubts regarding the installation
or operation of any of our ac-mains measurement instruments and accessories.
operates at a relatively low voltage due to its closed-loop, low burden configuration
(essentially zero Ohms when used with DATEL’s ACA5 series ammeters). However, any
CT can generate potentially lethal voltages if its output current is suddenly interrupted. For
example, loose secondary connections can produce a condition referred to as “inductive
kick.” Inductive kick can generate extremely high voltages across the open secondary
connections.
Therefore, all connections made to a CT’s secondary leads must only be performed with
zero current flowing in the primary circuit. Never operate a CT with its secondary circuit
open and current flowing in the primary.
5A output terminals to earth/chassis ground. In the USA, consult the latest revision of the
National Electrical Code for more information.
After all mechanical assembly is completed, pass the 5A secondary leads through the
ACA5 ammeter’s built-in toroid, then connect the two leads together as shown in Figure
1. For this connection, and for connections involving lead extensions, pressure-style
connectors (commonly called “wire nuts”) are acceptable as long as they are rated for the
currents and voltages involved.
applied to the primary conductor that passes through the CT or to the secondary circuit
and its associated instruments. Use plastic tie-wraps and/or other suitable non-conductive
restraining devices to secure the CT.
These commercial grade, UL & CSA recognized, “donut style” AC current-transformers
All models feature rugged, fully insulated construction, allowing continuous operation
Technical enquiries email: sales@murata-ps.com, tel:
5 Amp AC Current Transformers
DMS Accessories
MPM_DMS-CT.A01 Page 1 of 4
+1 508 339 3000
