Delivery program

Product range
PKM0 motor protective circuit-breakers up to 32 A
Basic function
Short-circuit protective device only
0000SPC-571
Notes
Also suitable for motors with efficiency class IE3.
Connection technique
Screw terminals
Contact sequence
121S037
Max. motor rating
AC-3220 V 230 V 240 V [P]
5.5 kW
AC-3380 V 400 V 415 V [P]
9 kW
AC-3440 V [P]
11 kW
AC-3500 V [P]
12.5 kW
AC-3660 V 690 V [P]
15 kW
Rated uninterrupted current [Iu]
20 A
Setting range
short-circuit release [Irm ]max. [Irm ]
310 A
Notes
An appropriate overload relay must be fitted to protect motors against overload.
Can be snapped on to IEC/EN 60715 top-hat rail with 7.5 or 15 mm height.
Refer to catalog CA034001DE for the allocation of short circuit protection and contactor
When using the PKM0 as short-circuit protection for motors with heavy starting duty, the rated operational current Ie must be over-dimensioned during engineering with the following factors:
CLASS 5: 1,0
CLASS 10: 1,0
CLASS 15: 1,22
CLASS 20: 1,41
CLASS 25: 1,58
CLASS 30: 1,73
CLASS 35: 1,89
CLASS 40: 2,0

Technical data

General
Standards
IEC/EN 60947, VDE 0660
Climatic proofing
Damp heat, constant, to IEC 60068-2-78
Damp heat, cyclic, to IEC 60068-2-30
Ambient temperatureStorage
- 40 - 80 °C
Ambient temperatureOpen
-25 - +55 °C
Ambient temperatureEnclosed
- 25 - 40 °C
Mounting position
1210DRW-68
Direction of incoming supply
as required
Degree of protectionDevice
IP20
Degree of protectionTerminations
IP00
Protection against direct contact when actuated from front (EN 50274)
Finger and back-of-hand proof
Mechanical shock resistance half-sinusoidal shock 10 ms to IEC 60068-2-27
25 g
Altitude
Max. 2000 m
Terminal capacity main cableScrew terminalsSolid
1 x (1 - 6)
2 x (1 - 6) mm2
Terminal capacity main cableScrew terminalsFlexible with ferrule to DIN 46228
1 x (1 - 6)
2 x (1 - 6) mm2
Terminal capacity main cableScrew terminalsSolid or stranded
18 - 10 AWG
Terminal capacity main cableScrew terminalsStripping length
10 mm
Specified tightening torque for terminal screwsMain cable
1.7 Nm
Specified tightening torque for terminal screwsControl circuit cables
1 Nm
Main conducting paths
Rated impulse withstand voltage [Uimp]
6000 V AC
Overvoltage category/pollution degree
III/3
Rated operational voltage [Ue ]
690 V AC
Rated uninterrupted current = rated operational current [Iu = Ie ]
20 A
Rated frequency [f]
40 - 60 Hz
Current heat loss (3 pole at operating temperature)
5.82 W
Impedance per pole
5 mΩ
Lifespan, mechanical [Operations]
0.1 x 106
Lifespan, electrical (AC-3 at 400 V)Lifespan, electrical [Operations]
0.1 x 106
Max. operating frequency
40 Ops/h
Motor switching capacityAC-3 (up to 690V)
20 A
Motor switching capacityDC-5 (up to 250V)
20 (3 contacts in series) A
Trip blocks
Temperature compensationto IEC/EN 60947, VDE 0660
- 5…40 °C
Temperature compensationOperating range
- 25…55 °C
Temperature compensation residual error for T > 40 °C
≦ 0.25 %/K
short-circuit release
Basic device, fixed: 15.5 x Iu
Short-circuit release tolerance
± 20%

Design verification as per IEC/EN 61439

Technical data for design verification
Rated operational current for specified heat dissipation [In]
20 A
Heat dissipation per pole, current-dependent [Pvid]
1.94 W
Equipment heat dissipation, current-dependent [Pvid]
5.82 W
Static heat dissipation, non-current-dependent [Pvs]
0 W
Heat dissipation capacity [Pdiss]
0 W
Operating ambient temperature min.
-25 °C
Operating ambient temperature max.
+55 °C
IEC/EN 61439 design verification
10.2 Strength of materials and parts10.2.2 Corrosion resistance
Meets the product standard's requirements.
10.2 Strength of materials and parts10.2.3.1 Verification of thermal stability of enclosures
Meets the product standard's requirements.
10.2 Strength of materials and parts10.2.3.2 Verification of resistance of insulating materials to normal heat
Meets the product standard's requirements.
10.2 Strength of materials and parts10.2.3.3 Verification of resistance of insulating materials to abnormal heat and fire due to internal electric effects
Meets the product standard's requirements.
10.2 Strength of materials and parts10.2.4 Resistance to ultra-violet (UV) radiation
Meets the product standard's requirements.
10.2 Strength of materials and parts10.2.5 Lifting
Does not apply, since the entire switchgear needs to be evaluated.
10.2 Strength of materials and parts10.2.6 Mechanical impact
Does not apply, since the entire switchgear needs to be evaluated.
10.2 Strength of materials and parts10.2.7 Inscriptions
Meets the product standard's requirements.
10.3 Degree of protection of ASSEMBLIES
Does not apply, since the entire switchgear needs to be evaluated.
10.4 Clearances and creepage distances
Meets the product standard's requirements.
10.5 Protection against electric shock
Does not apply, since the entire switchgear needs to be evaluated.
10.6 Incorporation of switching devices and components
Does not apply, since the entire switchgear needs to be evaluated.
10.7 Internal electrical circuits and connections
Is the panel builder's responsibility.
10.8 Connections for external conductors
Is the panel builder's responsibility.
10.9 Insulation properties10.9.2 Power-frequency electric strength
Is the panel builder's responsibility.
10.9 Insulation properties10.9.3 Impulse withstand voltage
Is the panel builder's responsibility.
10.9 Insulation properties10.9.4 Testing of enclosures made of insulating material
Is the panel builder's responsibility.
10.10 Temperature rise
The panel builder is responsible for the temperature rise calculation. Eaton will provide heat dissipation data for the devices.
10.11 Short-circuit rating
Is the panel builder's responsibility. The specifications for the switchgear must be observed.
10.12 Electromagnetic compatibility
Is the panel builder's responsibility. The specifications for the switchgear must be observed.
10.13 Mechanical function
The device meets the requirements, provided the information in the instruction leaflet (IL) is observed.

Technical data ETIM 7.0

Low-voltage industrial components (EG000017) / Motor protection circuit-breaker (EC000074)
Electric engineering, automation, process control engineering / Low-voltage switch technology / Circuit breaker (LV < 1 kV) / Motor protection circuit-breaker (ecl@ss10.0.1-27-37-04-01 [AGZ529016])
Overload release current setting
0 - 0 A
Adjustment range undelayed short-circuit release
310 - 310 A
With thermal protection
No
Phase failure sensitive
No
Switch off technique
Magnetic
Rated operating voltage
690 - 690 V
Rated permanent current Iu
20 A
Rated operation power at AC-3, 230 V
5.5 kW
Rated operation power at AC-3, 400 V
9 kW
Type of electrical connection of main circuit
Screw connection
Type of control element
Turn button
Device construction
Built-in device fixed built-in technique
With integrated auxiliary switch
No
With integrated under voltage release
No
Number of poles
3
Rated short-circuit breaking capacity lcu at 400 V, AC
50 kA
Degree of protection (IP)
IP20
Height
93 mm
Width
45 mm
Depth
76 mm

Approvals

Specially designed for North America
No

Characteristics

1210CON-20
Accessories
1: Standard auxiliary contact
2: Trip-indicating auxiliary contact
3: Shunt releases, undervoltage releases
Characteristic curve
121U017
Let-through current
Characteristic curve
121U016
① 1 half-cycle
Let-through energy

Dimensions

121X001
Motor-protective circuit-breaker with standard auxiliary contact
PKZM0-…(+NHI-E-…-PKZ0)
PKZM0-…-T(+NHI-E-…-PKZ0)
PKM0-…(+NHI-E-…-PKZ0)
121X002
Motor-protective circuit-breakers with lockable rotary handles
PKZM0-…+AK-PKZ0
121X042
Motor-protective circuit-breakers with early-make auxiliary contacts
PKZM0-…+VHI-…-PKZ0