Gestra TRG5-57

temperature sensors TRG 5-57

Data Sheet 810377-02 Issue Date: 01/08
Temperature Sensors
TRG 5-53, TRG 5-54, TRG 5-55, TRG 5-57
Description
Technical Data
TRG 5-53, TRG 5-54, TRG 5-55 and TRG 5-57 are tem­perature sensors according to DIN EN 14597.
Type approval
DIN STW (STB) 98507 S
GL 99251-96 HH
DIN TW 10 68 07
EG 01 202931-B-010008
The temperature feeler Pt 100 integrated in the protection tube has a temperature-specific resistance. The temperature
switches TRS 5-6 or TRS 5-8 measure the resistance and give an alarm according to the limit settings.
Application in steam and (pressurised) hot-water installations to TRD 604 and all kinds of heat-generating units.
Function The temperature sensors TRG 5-53, TRG 5-54, TRG 5-55 and TRG 5-57 have a standardised platinum resistance thermometer Pt 100 to IEC 751. A temperature sensor together
with a temperature switch type TRS 5-6 or TRS 5-8 form a temperature monitoring system. A current source supplies the
resistance thermometer Pt 100 via an adjusting resistor with a constant current. The desired switch-off temperatures can
be set via the eight-pole code switches of the temperature switches. To ensure fail-safe alarms if the temperature limit
is exceeded the equipment features contact relays of the normally closed type that will signal alarm condition in the
event of a mains failure.
TRG 5-53
TRG 5-54
System components
TRS 5-6 Temperature switch TRS 5-6 as high-integrity self-moni­toring temperature switch with periodic self-checking.
TRG 5-55, TRG 5-57:
160 bar g (2321 psig), 345 °C (653 °F) 120 bar g (1741 psig), 540 °C (1004°F)
Admissible flow velocity
TRG 5-53, TRG 5-54:
Air 25 m/s Superheated steam 25 m/s Water 3 m/s
TRG 5-55, TRG 5-57:
Air 60 m/s Superheated steam 60 m/s Water 5 m/s Connections
TRG 5-53, TRG 5-54: Screwed stub ½"
TRG 5-55, TRG 5-57: Socket-weld end ∅ 18 mm
TRS 5-8 Temperature switch TRS 5-8 as MIN/MAX temperature switch, temperature limiter.
Length of protection tube
TRG 5-53, TRG 5-54:
100 mm, 160 mm, 250 mm, 400 mm nominal length
Types
TRG 5-55: 115 mm, form 4
TRG 5-57: 140 mm, form 4
TRG 5-53, TRG 5-54:
Design with screwed sockets ½" to ISO 228-1.
TRG 5-55, TRG 5-57:
Design with welding stub, form 4
Design The temperature sensors feature an exchangeable temperature sensing element Pt 100, IEC 751. To ensure short
response times the temperature sensors are installed without an additional thermowell.
Materials
TRG 5-53, TRG 5-54:
Protection tube made of S. S. X 6 CrNiMoTi 1712 2 (1.4571)
TRG 5-55, TRG 5-57:
Protection tube made of forged alloy steel 13 CrMo 4 4 (1.7335) Max. admissible ambient temperature
at terminal box 100 °C (212°F)
Versions
Protection of terminal box
IP 65
Platinum resistance thermometer Pt 100 to IEC 751, class B, with exchangeable temperature sensing element
Temperature sensing element Pt 100 to IEC 751, class B/A
n TRG 5-53, TRG 5-55, TRG 5-57: single
Weight
TRG 5-53, TRG 5-54:
approx. 0.9 kg at nominal length 100 mm, approx. 1.0 kg at nominal length 160 mm,
approx. 1.1 kg at nominal length 250 mm, approx. 1.3 kg at nominal length 400 mm.
TRG 5-54: double n TRG 5-53, TRG 5-54: with protection tube
TRG 5-55, TRG 5-57: with weld-in protection tube
TRG 5-55
TRG 5-57
Service pressure/service temperature
TRG 5-53, TRG 5-54:
nominal length 100/160/250 mm 40 bar g (580 psig), 251 °C (484 °F) 36 bar g (522 psig), 400 °C (752 °F)
nominal length 400 mm 18 bar g (261 psig), 400 °C (752 °F)
TRG 5-55:
approx. 0.7 kg at nominal length 115 mm
TRG 5-57:
approx. 0.8 kg at nominal length 140 mm