Schweitzer Engineering Laboratories SEL-701 - Table 2.1; Typical Maximum RTD Lead Lengths

Date Code 20010719 701 Motor Protection Relay
Installation
Relay Connections
2.19
Table 2.1 Typical M aximum RTD Lea d Lengths0
Table 2.1 shows typical maximum RTD lead lengths for various wire gauges. Use
shielded cable for the RTD connections, with the shield connected to ground at the
relay. Two shield connection terminals, A01 and A30, are provided for grounding at
the relay. You may also connect shield wires to the common connection terminals,
A04, A09, A14, A19, A24, and A29.
Table 2.1 Typical Maximum RTD Lead Length
RTD Lead AWG Platinum or Nickel RTD Copper RTD
24
950 ft
(290 m)
110 ft
(290 m)
22 1500 ft
(455 m)
180 ft
(54 m)
20 2400 ft
(730 m)
290 ft
(88 m)
18 3800 ft
(1155 m)
450 ft
(137 m)