GE Masoneilan 469 Series, Instruction Manual

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3–12 469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL
CHAPTER 3: INSTALLATION
3.2.2 Description
A broad range of 469 applications are available. Although it is not possible to present
typical connections for all possible schemes, this section will cover the interconnections of
instrument transformer inputs, other inputs, outputs, communications, and grounding. See
FIGURE 3–11:
Terminal Layout on page 3–9 and Table 3–1: 469 Terminal List on page 3–9
for terminal arrangement.
3.2.3 Control Power
The order code from the terminal label on the side of the drawout unit specifies the
nominal control voltage as follows:
LO: 20 to 60 V DC; 20 to 48 V AC, or
HI: 90 to 300 V DC; 70 to 265 V AC
Ensure applied control voltage and rated voltage on drawout case terminal label match.
For example, the HI power supply will work with any DC voltage from 90 to 300 V, or AC
voltage from 70 to 265 V. The internal fuse may blow if the applied voltage exceeds this
range.
The 469 control power must match the installed switching power supply. If the applied
voltage does not match, damage to the unit may occur!
FIGURE 3–13: Control Power Connection
Extensive filtering and transient protection are built into the 469 to ensure proper
operation in harsh industrial environments. Transient energy must be conducted back to
the source through the filter ground terminal. A separate safety ground terminal is
provided for hi-pot testing.
All grounds MUST be hooked up for normal operation regardless of control power
supply type.