ISA DRTS.3 PLUS - 4.9 IN2-CDG current booster for 1 A rated relays and for the CDG relay of GE; code ZII99156

Doc. SIE62153 Rev. 1 Page 20/24
- The cable, 2 m long, from the scanning head to the DRTS;
- The power supply transformer, for the power of 220 Vac, to supply the scanning head.
- Two safety banana plugs for the connection to RTS.3.
4.9 IN2-CDG current booster for 1 A rated relays and for the CDG relay of GE; code
ZII99156
With DRTS.3 PLUS the full power of 100 VA is available only at the current of 15 A. This is good
for the test of relays with the nominal current of 5 A; if relays are rated 1 A the available power can
be not adequate to perform the test. In addition to this, relay CDG of GE has very low current
settings.
The option IN2-CDG solves this problem, by means of a set of three current transformers, with the
following characteristics:
. Primaries: 12.5 A and 15 A;
. Secondaries: 0.5 A; 1 A; 2.5 A; 5 A;
. Nominal power: 100 VA;
. Current ratio error: 0.2.
- Case: plastic.
- Connections:
. Four primary side sockets (I1, I2, I3, IN);
. Three independent outputs, with one phase socket and 2 zero sockets;
. Ease of connecting outputs in star or delta configuration.
. For the single phase test of the CDG relay it is possible to have three times the above power,
connecting current outputs in series.
The option includes four connecting cables to DRTS.3 PLUS current outputs, 1 m long, 2.5 sq. mm
cross section. Outputs are do not have a common neutral; this eases the star or delta connection.
Included is a bridge for star connection.
NOTE: the software takes into account the transformers ratio.
4.10 Transit case
The protection of DRTS.3 PLUS from delivery problems is provided by this robust transit case, that
features the following.
- Molded-case construction;
- Handle on the top;
- Dimensions: 24 x 57 x 58 cm.
4.11 Mains synchroniser option, code PII24156
The option is made of a plug that fits into the mains, and that has two banana sockets for the
connection to the test set counting input. The purpose is to synchronize the outputs of two test sets
to the mains: as the synchronisation is repeated every 2 minutes, the test set stays locked to the
mains for the infinity.
The option includes a circuit that squares the sinusoidal mains waveform; the isolated output is a
square-wave with an amplitude of 18 V nominal, running at the mains frequency.