Protective Devices
Manual Motor Starters Z-MS
•
•
•
•
Reliable protection in case of thermal overload and short circuit
Connection
Suitable for installation in compact distribution boxes
2-pole
Contact position indicator red - green
Main field of application: switching and protection of three-phase AC
motors with power ratings up to 15 kW (380/400 V) and other consumers up
to 40 A
• Also suitable as main switch, isolating characteristics according to
IEC/EN 60947
• All manual motor starters with thermal overload tripping and magnetic
short-circuit tripping
• Terminals and accessories compatible with CLS6, Z-A40, PFIM etc.
diagram
3-pole
Technical Data
General
Terminal capacity
Busbar thickness
Mechanical endurance
Shock resistance (shock duration 20 ms)
Ambient temperature
open
hermetically enclosed
Resistance to climatic conditions
- humidity and heat, constant, according to
- humidity and heat, periodical, according to
Weight approx.
Degree of protection
1 - 25 mm2
0.8 - 2 mm
20.000 operating cycles
20 g
-25 ... + 50°C
-25 ... + 40°C
IEC 68-2-3
IEC 68-2-30
244/366 g
IP20
Main Current Paths
Rated insulation voltage Ui
Rated peak withstand voltage Uimp
Rated short circuit breaking capacity Iq
Thermal current Ithmax = Iemax
Electrical endurance AC3 at Ie
Motor switching capacity AC3
Power loss per contact
440 V
4 kV
10 kA
40 A
6000 operating cycles
400 (415) V
2.3W (1.6-10A); 3.3W (16A); 4.5W (25-40A)
Auxiliary switch Z-AHK/Z-NHK
Rated insulation voltage Ui
Thermal current Ith
Rated operational current Ie
250 V
AC 13
440 V
Max. back-up fuse for short-circuit protection
Terminal capacity (1 or 2 conductors)
440 V
8A
6A
2A
4 A (gL, gG) CLS6-4/B-HS
0,75 ... 2.5 mm2
Moisture-Proof Enclosure 4 MU IP54, Z-MFG
Reliable power loss of incorporated devices
17W (e.g Z-MS-40/3+Z-USA/230)
Dimensions (mm)
Connection
1-phase / 2-pole
1-phase / 3-pole
3-phase / 3-pole
Ue = 400 V~
Ie = 10 - 16 A
Iq = 10000 A
Magnetic release responding current (typ.)
referring to setting range end value . . . .
325
.......
Protective Devices
Selection of Switches for the Protection of Motors
Motor power and current
1-phase
230 - 240 V
kW
3-phase
230 - 240 V
A
3-phase
400 - 415 V
kW
A
0,7
kW
0,06
0,09
0,12
0,18
0,25
A
0,2
0,3
0,4
0,6
0,8
0,06
0,09
0,4
0,5
0,12
0,18
0,25
0,37
1,0
1,4
2,0
0,37
0,55
0,75
1,1
1,5
1,9
0,55
0,8
1,1
2,7
3,2
4,6
1,1
1,5
2,2
2,6
3,6
5,0
1,5
2,5
6,3
8,7
2,5-3,0
6,6
4,0
5,5
7,5
8,5
11,3
13,2
11,0
15,0
18,5
21,7
29,3
36,0
0,06
0,09
0,12
0,7
0,7
1,3
0,18
0,25
0,37
1,9
2,4
2,9
0,55
0,75
1,1
1,5
4,2
5,6
7,4
8,9
2,2
14,5
3,0
11,5
3
17,8
4,0
5,5
7,5
11,0
14,8
19,6
26,4
38,0
Setting ranges of
overload release
A
0,16 - 0,25
0,25 - 0,4
0,4 - 0,63
0,4 - 0,63
0,63 - 1
0,63 - 1
1 - 1,6
1 - 1,6
1,6 - 2,5
1,6 - 2,5
2,5 - 4
2,5 - 4
4 - 6,3
4 - 6,3
6,3 - 10
6,3 - 10
6,3 - 10
10 - 16
10 - 16
16 - 20
16 - 20
25 - 40
25 - 40
Overview of Types, Maximum Back-up Fuse and Short Circuit Behaviour
1)
Type
Setting range
(A)
Z-MS-0,16
Z-MS-0,25
Z-MS-0,40
Z-MS-0,63
Z-MS-1,00
Z-MS-1,60
Z-MS-2,50
Z-MS-4,00
Z-MS-6,30
Z-MS-10,0
Z-MS-16,0
Z-MS-25,0
Z-MS-40,0
0,10 - 0,16
0,16 - 0,25
0,25 - 0,40
0,40 - 0,63
0,63 - 1,00
1,0 - 1,6
1,6 - 2,5
2,5 - 4,0
4,0 - 6,3
6,3 - 10,0
10,0 - 16,0
16,0 - 25,0
25,0 - 40,0
max. back-up fuse gL, gG1)
(A)
(A)
3 x 230 V
3 x 400 V
in case of short circuit currents
up to the short circuit
breaking capacity,
no back-up fuse required
100
100
100
100
100
100
100
100
100
100
Typical responding currents
of short-circuit releases
(A)
1,3 - 1,7
2,0 - 2,6
3,1 - 4,8
4,9 - 6,6
10 - 13
16 - 21
25 - 33
40 - 52
63 - 82
78 - 105
160 - 208
250 - 325
400 - 520
In case of short circuit currents up to the rated breaking capacity, no back-up fuse is required (inherent current withstand capability)
Connection of Shunt Trip Release
Connection of Undervoltage Release
e.g.
Z-MS-2p + ZP-ASA
Block Diagram with Remote Switching Device
e.g.
Z-MS-3p + Z-USA
ZP-NHK + Z-MS-3p + Z-FW-LP
326
Protective Devices
Effect of the Ambient Temperature on the Load Capacity
Load capacity factor KN
Load capacity KT [I/In]
Load Capacity in Case of Block Installation
Ambient temperature T [°C]
Number of devices (n) 1-pole
Permitted permanent load at ambient temperature T [°C] with n devices: Valid for Z-MS devices, 3-pole, reference ambient temperature 20°C,
IDL(T,n) = InKT(T) Kn(n)
permitted permanent load at ambient temperature T [°C] with n devices:
IL(T) = InKT(T)
Typical Tripping Characteristic MS 0,16/0,25/0,4/0,63/10A
Typical Tripping Characteristic MS 1/1,6/2,5/4/6,3/16/25/40A
Defined non-tripping current
Defined non-tripping current
Defined tripping current
Defined tripping current
thermal setting current
max. thermal setting current
thermal setting current
max. thermal setting current
Tripping current as a multiple of the maximum setting current,
at an ambient temperature of 20 °C, from cold state
Tripping current as a multiple of the maximum setting current,
at an ambient temperature of 20 °C, from cold state
327
Protective Devices
Accessories for Manual Motor Starters
• Accessories for manual motor starters are the same as for PFIM, CLS etc.
(releases, auxiliary switches, and busbars
• Shunt trip release ZP-ASA
• Undervoltage releases
Z-USA: instantaneous
Z-USD: delayed
• Auxiliary switch ZP-IHK: 1 NO + 1 NC
• Tripping signal switch ZP-NHK: 1 CO + 1 CO
• Remote control and automatic switching device Z-FW
• Moisture-proof enclosure IP54
Z-MFG
Z-MFG/NL: with N-led through (solid neutral)
Z-MFG/NOT: with N-led through (solid neutral) and EMERGENCY OFF key
Installation Example
ZP-NHK + Z-MS-2p + Z-FW-LP
Dimensions (mm)
ZP-IHK
ZP-NHK
ZP-ASA
Z-USA, -USD
Moisture-proof Enclosure Z-MFG
• According to EN 50298
• Suitable for manual motor starters Z-MS, e.g. 3p (+ Z-USA);
miniature circuit breakers CLS, e.g. 3p (+ Z-USA);
circuit breakers Z-A40
• Earth conductor connection integrated in all types
• Entries for 4 x PG16 cable glands prepared
• Operation: Turning handle, can be locked in the OFF-position by means of
3 padlocks, max. Ø 6 mm
• Enclosure cover can be sealed with leads in 2 locations
• Scope of delivery: 4 entry bushes, 1 mushroom-shaped pushbutton (red) +
1 contact (NC) in Z-MFG/NOT
Technical Data
Electrical
Power Loss of installed devices
Mechanical
Degree of protection
Protection class
Neutral connection
Max. Device width
Terminal capacity N/PE
Tightening torque
N/PE-terminals
cover screws
Z-MFG
Z-MFG//NL
Z-MFG/NOT
max. 17 W
max. 17 W
max. 17 W
IP54
II
–
4MU
max. 16 mm2
IP54
II
integrated
4MU
max. 16 mm2
IP54
II
integrated
4MU
max. 16 mm2
max. 2 Nm
max. 2 Nm
max. 2 Nm
max. 2 Nm
max. 2 Nm
max. 2 Nm
Dimensions (mm)
Z-MFG
Z-MFG/NL
Z-MFG/NOT
328