CTT-8

CTT-8

8 PT100 sensors.

2 alarm levels.

Maximum values.

RS485.

AO.

DEVICES FOR PROTECTION, CONTROL, THERMIC MONITORING OF TRANSFORMERS,
MOTORS, GENERATORS, INDUSTRIAL APPLICATIONS

Temperature measuring unit. 8 PT100 RTD sensors. Control and safety of power transformers.

Introduction
Range	CTT
Product name	CTT-8
Product type	Temperature monitor device

Technical characteristics
Device application	Temperature monitoring of power transformers
Type of measurement	Display of instantaneous and maximum temperature Double intervention level: alarm (ALARM) and trip (TRIP) Self-diagnosis function for anomalies or incorrect installation (FAULT) Possibility of activating forced ventilation (FAN)
Supply voltage	20...250 VAC/DC 115-230-400 VAC 50...60 Hz (optional)
Power consumption	4 VA
Display type	LED 7 digit
Measure inputs	8 PT100 RTD (not included)
Sensor type	3 wires (2 and 4 wire versions also supported)
Specific error	1 degree every 0,39 ?
Measurement range	0...220 °C +/- 2
Compensation	20 ? max
Tripped delay/hysteresis	5 s/2 °C
Output relays	4
Output type	NA-C-NC
Programmable functions	Alarm Trip Fan Self-diagnosis
Mounting mode	Flush mount 96x96 mm
Standards	CEI EN 50081-2 CEI EN 50082-2 CEI 14.1 CEI EN 60255
Weight	500g

Environment
IP degree of protection	IP52 front IP20 terminals
Relative humidity	5...90%
Operating temperature	-10...+55 °C
Storage temperature	-25...+80 °C

Options
Transparent cover IP65
Number of analog outputs	1AO
Communication port	RS485 Modbus

APPLICATIONS

Overtemperatures caused by overloads or internal failure due to degradetion of the dielectric qualities of insulating materials in transformers and electrical machines, inevitably leads to a reduced efficiency andenergy loss in ditribution systems. To prevent and control degradation ofinsultaing materials in electrical machines due the thermal stress, it sinecessary to use integrated measurement systems such as CTT control units.