KS corrosion protection and OS surface protection
SEW‑EURODRIVE offers various optional protective measures which, when combined, provide optimal protection for the operation of motors and gearmotors under special ambient conditions.
KS corrosion protection for motors comprises the following measures:
- All retaining screws that are loosened during operation are made of stainless steel.
- The nameplates are made of stainless steel Various motor parts are coated with a finishing varnish.
- The flange contact surfaces and shaft ends are treated with a temporary rust preventive.
- Additional measures for brakemotors.
Instead of standard surface protection, motors and gear units are optionally available with OS1, OS2, OS3 or OS4 surface protection.
This makes the gearmotors well equipped for operation under various ambient conditions.
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Surface protection
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Ambient conditions/sample applications
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Standard
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Suitable for machines and systems within buildings and interior rooms with neutral atmospheres.
Similar to corrosivity category C1 (negligible).
Sample applications:
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OS1
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Suitable for environments prone to condensation and atmospheres with low humidity or contamination. E.g. outdoor applications under a roof or with a protection device.
Similar to corrosion category C2 (negligible).
Sample applications:
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OS2
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Suitable for environments with high humidity or medium atmospheric contamination. such as applications outdoors subject to direct weathering.
Similar to corrosion category C3 (moderate).
Sample applications:
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OS3
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Suitable for environments with high humidity and occasionally severe atmospheric and chemical contamination. Occasionally acidic or caustic wet cleaning. Also for applications in coastal areas with moderate salt load.
Similar to corrosion category C4 (high).
Sample applications:
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OS4
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Suitable for environments with permanent humidity or severe atmospheric or chemical contamination. Regular acidic and caustic wet cleaning, also with chemical cleaning agents.
Similar to corrosion category C5‑I (very high).
Sample applications:
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DAS Aseptic
OS2 – OS4
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Suitable for dry or humid hygienic areas with mean atmospheric contamination. Also suitable for particularly dusty environments.
Similar to corrosion category C3 (moderate).
Sample applications:
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DAS Asepticplus
OS4
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Suitable for hygienic areas in the food and beverage industry with permanent humidity and regular acidic and wet cleaning with chemical cleaning agents. Pressure cleaning up to 80 bar.
Similar to corrosion category C5‑I (very high).
Sample applications:
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High protection surface
HP200
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For hygienic areas in the food and beverage industry with regular acidic or caustic wet cleaning. Anti-stick properties support the cleaning process even in inaccessible areas.
Sample applications:
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Stainless steel gearmotor
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For hygienic areas in the food and beverage industry with permanent humidity and extreme acidic and caustic wet cleaning using chemical cleaning agents.
Sample applications:
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In addition to standard surface protection, motors and gear units have the option of surface protection OS1 to OS4. Also available is the special option Z that specifies large surface recesses filled with a rubber-like material for a smooth bodied unit.
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Technical data
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Surface protection
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Coating structure
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Coating thickness [mils] (µm)
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Suitable for1
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Exterior
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Interior
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OSG
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1 × Dip primer
1 × Single-component primer
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Minimum
1.5 to 2.0
(40 to 50)
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Generally not suitable as finish coat. Additional coating to be applied after shipment from SEW-EURODRIVE.
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Standard
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1 × Dip primer
1 × Single-component top coat
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Minimum
1.5 to 2.0
(40 to 50)
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Normal ambient conditions
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–
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Heated buildings with clean atmospheres (e.g., offices, shops, schools, hotels).
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OS1
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1 × Dip primer
1 × Single-component primer
1 × Single-component top coat
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Minimum
3.0 to 4.0
(75 to 100)
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Low environmental impact
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Atmospheres with low levels of pollution.
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Unheated buildings where condensation may occur (e.g., depots, sports halls).
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OS2
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1 × Dip primer
1 × Two-component primer
1 × Single-component top coat
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Minimum
4.0 to 5.0
(100 to 125)
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Medium environmental impact
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Urban and industrial atmospheres, moderate sulfur dioxide pollution. Coastal areas with low salinity.
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Production rooms with high humidity and some air pollution (e.g., laundries).
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OS3
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1 × Dip primer
1 × Two-component primer
1 × Two-component top coat
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Minimum
5.0 to 6.0
(125 to 150)
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High environmental impact
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Industrial areas and coastal areas with moderate salinity.
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Chemical plants, shipyards.
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OS4
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1 × Dip primer
1 × Two-component primer
1 × Two-component top coat
1 × Two-component clear coat
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Minimum
7.5 to 9.0
(190 to 230)
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Very high environmental impact
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Industrial areas with high humidity and aggressive atmosphere.
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Buildings or areas with almost permanent condensation and with high pollution (e.g., food processing, breweries, dairies).
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1) Conditions listed are general recommendations only. Each environment must be evaluated independently.
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Symbol
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Coating Type
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Coating Supplier
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Product
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Dip primer
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Various per MS 01 901 _ 99
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Single-component primer (water-based)
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Burke Industrial Coatings
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Prime Solution 5255
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Single-component top coat (water-based)
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Burke Industrial Coatings
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Superlife 316 DTMR
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Two-component epoxy primter (water-based)
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Burke Industrial Coatings
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Steel Plus Epoxy Primer
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Two-component epoxy top coat (water-based)
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Burke Industrial Coatings
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Steel Plus CE 316 Epoxy
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Two-component clear epoxy top coat (water-based)
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Burke Industrial Coatings
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Steel Plus CE Clear Gloss Epoxy
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Coating thicknesses do not include the dip primer.
All coatings are currently water based.
All coatings are suitable for relative humidity of 100 %.
All coatings are suitable for surface temperatures of 300 ºF (~150 ºC).
On request, SEW-EURODRIVE motors and gearmotors can be supplied with an integrated mechanical brake. The brake is a DC electromagnetic disc brake that is released electrically and applied with spring force. The brake is applied in case of a power failure.
It meets the basic safety requirements. The brake can also be released mechanically if equipped with manual brake release. For this purpose, the brake is supplied with either a hand lever with automatic reset or an adjustable setscrew. The brake is controlled with a brake control that is either installed in the motor wiring space or the control cabinet.
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Additional options
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Plug connector type IS
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Optional for DR/DT/DV series AC motors and AC brake motors. The IS plug connector is delivered instead of the standard terminal box. The upper section of the IS plug connector (mating connector) is included in the scope of delivery. The IS plug connector is particularly compact and offers the following connection options:
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Installed plug connector type AB / AM
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Optional for DR/DT/DV series AC motors and AC brake motors. The mounted AB.. and AM.. plug connector systems are based on the Han Modular® plug connector system made by Harting.
AB.. and AM.. plug connectors can be used for connecting single-speed motors. With brake motors, the brake control system can be either located in the terminal box or in the control cabinet. All versions of the brake control system are possible.
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Installed plug connectors type AC / AS
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Optional for DR/DT/DV series AC motors and AC brake motors. The installed AC.. and AS.. connector systems are based on the Han 10E/10ES connector system made by Harting.
You can connect single speed motors.
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Proximity sensor type NV
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Optional for DT/DV series AC motors and AC brake motors SEW-EURODRIVE proximity sensors are a simple and inexpensive means of monitoring whether the motor is turning. If a two-track proximity sensor is used, the direction of rotation of the motor can also be detected. Proximity sensors are mounted on the side of the fan guard and so do not increase the length of the motor.
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Incremental encoder type EH / ES / EV
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Optional for DR/DT/DV series AC motors and AC brake motors. SEW-EURODRIVE incremental encoders output 1024 signals/revolution. They have two signal tracks and one index signal track.
Incremental encoders are available as hollow shaft encoders, spreadshaft encoders and solid shaft encoders with coupling. Signal output: TTL or sin/cos.
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Encoder mounting device for type ES / EV
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Optional for DT/DV series AC motors and AC brake motors The motors can be equipped with various encoder attachment fittings for mounting devices from different manufacturers.
Mounting devices for encoders are intended for spreadshaft encoders with an 8 mm (0.3 in) or 10 mm (0.39 in) center bore and for solid shaft encoders (synchronous flange).
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Absolute encoder type AV1Y / AV1H
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SEW-EURODRIVE AV1Y and AV1H absolute encoders are combination encoders. They contain a multi-turn absolute encoder and a high-resolution sinusoidal encoder. You can choose between an SSI interface or a HIPERFACE® interface for data transmission of absolute values. The AV1H absolute encoder has an electronic nameplate.
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Forced cooling fan type VR / VS / V
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DT/DV series AC motors and AC brake motors can be equipped with a forced cooling fan on request. A forced cooling fan is usually not required for mains operated motors in continuous duty. SEW-EURODRIVE recommends a forced cooling fan for the following applications:
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Additional flywheel mass Z
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DR/DT/DV series AC motors and AC brake motors can be equipped with additional flywheel mass Z (flywheel fan) to facilitate smoother starting and braking response from mains-operated motors. The fan gives the motor an additional mass moment of inertia JZ. The flywheel fan replaces the normal fan and does not affect the external dimensions of the motor.
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RS backstop
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DT/DV series AC motors and AC brake motors can be equipped with a backstop if required. The backstop is used for protecting equipment against reverse movement when the motor is switched off.
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Protection canopy C
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Optional for DR/DT/DV series AC motors and AC brake motors. Liquids and/or solid foreign objects can penetrate the air inlet openings of motors when motors are mounted vertically with their input shaft pointing downwards.
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Low noise fan guard
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Optional for DT/DV series AC motors and AC brake motors Motor noise is amplified by the drive fan guards. The low noise fan guard reduces the noise level by approximately 3 dB(A) when compared with the standard version.
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WPU Smooth pole-change unit
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For DR/DT/DV series multi-speed AC motors and AC brake motors. Normal multi-speed motors cannot switch from high to low speed without jerks unless special measures are taken.
The WPU smooth pole-change unit completes this task electronically and requires minimal wiring work.
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