Grace CHEKVOLT R-3MT-VI Guide D'installation page 4

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1. Follow all Local, State, and National Electrical Codes when
installing this equipment. Overcurrent protection is not
recommended. If device leads are either extended beyond
the supplied length or the device installation extends beyond
the enclosure where the leads are terminated, overcurrent
protection of the supply leads may be required by Local, State
or National Electric Codes. The installation of overcurrent
protection shall be in accordance with the requirements in the
NEC (NFPA 70) or end product standard(s) when used in final
installation.
2. Locate the unit in visual proximity to the control panel ON/OFF
disconnect and within wiring distance to incoming Main Lines
and Earth Ground. Mount the unit through a 30.5 mm knockout
hole on the three-phase control panel to be monitored. To meet
Type 12, 13, 4, or 4X sealing requirements, mount with supplied
cap on a clean flat surface or inside a Type 4 or 4X housing.
(Fig.1)
3. For Delta configured power, connect 1 bar, 2 bar & 3 bar
black wires to L1, L2 & L3 respectively (Fig. 1) on the fused or
disconnect side of the 3-Phase line voltage. The Green/Yellow
stripe (Grn/Yel) wire MUST be connected to Earth Ground.
(Fig. 2)
INSTALLATION INSTRUCTIONS
4. With the R-3MT-VI installed, wired, and the enclosure closed,
verify the power disconnect is OFF.
5. Using the proper test equipment: the voltmeter should be rated
for Cat III/1000V and Cat IV/1000V. Test probes should be fully
insulated with .080" DIA points to insert into test point jacks.
6. Follow all safety and lock-out/Tag-out (LOTO) procedures. Set
voltmeter to ACV, verify zero voltage between (6) test point
combinations {L1-L2, L1-L3, L2-L3, L1-GND, L2-GND, L3-
GND}, Switch meter to DCV. Repeat all (6) measurements.
7. STORED ENERGY is present whenever DCV readings are
observed. The energy must be removed or discharged before
the enclosure is to be opened or electrician work is to be
performed.
8. Remove any unsafe load conditions and notify personnel power
is about to be restored. Turn power ON.
9. Repeat step 6 measurements but now verify proper operating
voltage conditions appear on the Test Point combinations.
Note: For greater accuracy, multiply voltmeter reading by a factor
of 1.03 to determine actual line voltage.)