Terminals K1, K2, K3 of the change-over contact of the polarized relay
Maximum DC/AC voltage:
125 V/150 V
Maximum switched/permanent current: 1 A
Maximum switched power:
30 W/60 VA
Electric strength between the coil and the contact of the relay:
2.5 kV
4.14 Dimensions and weight
Length × height × width:
170 × 130 × 42 mm
Weight:
0.75 kg
5. Design
As far as constructional design is concerned, the PQ monitor in its MEg30 version is
a portable measuring instrument emphasizing the requirements on minimum di-
mensions and on the flexibility of current sensors.
Its application even in modern, space-saving, compact switchboards is thus
made possible. A unit of PQ monitors in its MEg30 version is placed in a plastic,
all-insulated, self-extinguishing case with dimensions 170 × 120 × 42 mm, provided
with firmly connected voltage cables, with four connectors for connecting current
sensors or sensors of other physical quantities (I1, I2, I3, 14/T), with a signalizing
LED diode OPERATION (PROVOZ) and three LED diodes signalizing the magni-
tude of connected voltages being measured. The case of MEg30 includes a two-pole
terminal board with a removable plug of the signal SYNC and a three-pole terminal
board with a removable plug of the change-over contact of the polarized relay. Max-
imum cross-section of the connected conductor is 2.5 mm
2
.
Version MEg30 has five firmly connected double-insulated voltage cables with
length 1.5 m, ended with safety modular banana plugs. These cables maintain a
high flexibility even at negative temperatures. The measuring cables are marked
with U1, U2, U3, U4 and N at their ends. The measuring cables U1, U2, U3 and N
serve for a three-phase supply of MEg30 at the same time. The measuring cables U1,
U2, U3 and U4 are red, the measuring cable N is black. As need be, either safety alli-
gator clips or measuring grips with an integrated fuse type 10 133 01, manufacturer
Legrand, 1 A/500 V (10 × 38 mm) shall be installed on banana plugs of the measur-
ing cables. Red alligator clips shall be connected to cables U1, U2 and U3, a blue alli-
gator clip to cable U4 and a black one to the measuring cable N. For voltage
13
MEgA Měřicí Energetické Aparáty
