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PQube 3 Instruction Manual
Page 21 of 103
Maximum voltages
3.1.6.2
Connection
Measurement
Category
Maximum
current
Limitations and remarks
PQube 3 terminals
L1, L2, L3, N
600 Vrms, CAT III
Corresponds to 480V L-N / 830V L-L max for 3-phase, 4-
wire Wye/Star systems.
Corresponds to 600V L-L max for 3-phase, 3-wire Delta
systems.
Corresponds to 480V L-L max for 1-phase, 2-wire Single
Phase systems.
Corresponds to 480V L-N / 960V L-L max for Split-Single-
Phase, 3-wire systems.
All voltage channels must be covered after installation.
300 Vrms, CAT IV
Corresponds to 277 L-N / 480V L-L max for 3-phase, 4-wire
Wye/Star systems.
Corresponds to 480V L-L max for 3-phase, 3-wire Delta
systems.
Corresponds to 240V L-L max for 1-phase, 2-wire Single
Phase systems.
Corresponds to 240V L-N / 480V L-L max for Split-Single-
Phase, 3-wire systems.
All voltage channels must be covered after installation.
PQube 3 Earth terminal
N/A
Optional PQube 3 RLY
terminals
30 Vrms or 60 Vdc
0.3A
All other PQube 3
terminals
30 Vrms or 60 Vdc
PM1 AC input terminals
240 Vrms, CAT II
Rated for Single-Phase 100~240VAC max. AC voltage
input terminal must be covered after installation.
PM1 DC output
terminals
24 VDC
0.42A
10W maximum output
USB1 Input
5VDC
0.2A
USB2 and USB3
5VDC
0.1A
Note:
“CAT III” means Measurement Category III as defined in UL / IEC 61010-1: “Measurement category III is for
measurements performed in the building installation…. Examples are measurements on distribution boards, circuit-breakers,
wiring, including cables, bus-bars, junction boxes, switches, socket-outlets in the fixed installation, and equipment for industrial
use…”
“CAT IV” means Measurement Category IV as defined in UL / IEC 61010-1: “measurements performed at the source of the low-
voltage installation…. Examples are electricity meters and measurements on primary overcurrent protection devices and ripple
control units.”
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