美国德纳科Dynalco SW-50 Speed Switch速度开关

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SW-50 Data Sheet
SW-50 Manual Product Code: SW-50

sw-50提供了可靠的发动机超速保护，完全可现场编程。它有两个继电器设定点：一个超速加一个辅助起动断开、发电机磁场闪烁或其他报警。
The SW-50 provides reliable engine overspeed protection and is fully field- programmable. It has two relay setpoints: one overspeed plus one auxiliary for crank disconnect, generator field-flashing, or other alarm.

SW-50
Two-Setpoint
Speed Switch

可靠的发动机超速保护。

超速继电器加上第二个设定点

曲柄断开，发电机磁场-闪烁，

或其他警报。全现场编程

能力。
Reliable engine overspeed protection.
Overspeed relay plus a second setpoint for
crank disconnect, generator field- flashing,
or other alarm. Full field-programming
capability.

FEATURES
􀁺 Various signal sources: Senses signal
frequency from magnetic pickup or AC signal
generator.
􀁺 Field-programmable: Two 25-turn trim
potentiometers provide adjustment for setpoints
over 3–100% of full-scale frequency range.
􀁺 Test circuit: Permits on-line testing without
overspeeding the protected device.
􀁺 Rugged: Sealed, gasketed, reinforced case.
ENVIRONMENTAL
Temperature (storage & operation): -40oC to
+85oC (–40oF to +185oF).
Vibration:
a. MIL STD 810C, Method 514.2, Curve P,
Procedure V.
b. MIL STD 202F, Method 201A (10–55Hz,
continuous displacement of 0.06 inches P-P).
Screws on all access holes are predrilled for
safety wire.
Humidity: SAE J1211, paragraph 4.2.3., fig. 3A
(95% relative humidity at +66oC (+150oF).
Dust: MIL STD 810C, Method 510.1, Procedure 1,
Steps 1, 4, 5, and 6. (1750 ft/min velocity; 0.3g/ft3
density; <176 microM average particle size).
Sealing: Case can easily be opened and resealed
without damaging watertight integrity. O-ring sealed
access holes for setpoint adjustments. Complies
with NEMA Standard 250, types 4, 12, and 13.
Moisture protection: Component board entirely dipcoated
with moisture-repellent sealant.
SPECIFICATIONS
Input signal: Two input frequency ranges:
0–5,000 Hz, standard; or 0–10,000 Hz. Minimum
signal requirement: 0.15 Vrms (150 mVrms) for all
frequencies. Maximum signal: 70 Vrms. Minimum
input resistance: 10 KΩ.
Input power: 8–32 Vdc. (Operates with 12 or 24 Vdc
systems.) Maximum current consump-tion: 95 mA.
Can withstand 800 volts peak reverse; 80 volts peak
forward for 0.1 second maximum duration; and 350
volts peak forward for 1 millisecond duration.
Relays: SPDT for Overspeed; SPST N.O. contacts
for Auxiliary relay. Contact rating of 5 amperes at 30
Vdc/300 Vac, resistive. Setpoint adjustment range for
both relays: 3–100% of full-scale frequency range.
Integral 25-turn trim potentiometer for each relay
setpoint. Response time for both relay setpoints is 50
milliseconds, maximum.

SPECIFICATIONS (cont'd)
At stand-still (zero speed), power on, the standard
relay configuration is:
1. Overspeed relay: SPDT, normally energized.
Relay de-energizes and latches on overspeed.
Latching may be inhibited by jumpering Terminal 4 to
Terminal 2; resetting is then automatic.
2. Auxiliary relay: Normally de-energized. Relay
energizes above the setpoint, non-latching (automatic
reset).
Resetting relays:
a. The latched Overspeed relay is reset (after
speed is reduced by at least 2% below setpoint
value) by momentarily jumpering Terminal 4 to
Terminal 2 or by momentarily removing power.
b. The Auxiliary relay will automatically reset when
speed is reduced by at least 2% below setpoint
value.
Power up considerations: No relay flicker on power
up. At stand-still or speeds below setpoints, applying
dc power causes no flicker or change in the normally
de-energized Auxiliary relay. Power application resets
the Overspeed relay to the normally energized (no
alarm) condition.
Grounding, phase referencing: All circuits are
isolated from earth ground. The input circuit is
referenced to the negative side of the power supply so
that the magnetic pickup can be paralleled with
electrical governors and other similarly constructed
devices.
Signal cable shield: can be grounded directly or
taken to any designated electrical terminal on the
governor. (No shield terminal is provided in the speed
switch.)
Test: Jumpering Terminal 5 to Terminal 2 lowers the
setpoints to 90% ±2% of the actual value to permit
verifying the alarm setpoints without overspeeding
the engine.
Stability of setpoints:
a. Signal amplitude effect: ±0.5% full- scale
from 150 mVrms to 100 Vrms.
b. Power supply voltage effect: ±0.1% of
full-scale with 25% supply fluctuation.
c. Temperature effect: ±2.5% of full-scale
maximum with change in enviromental
temperature from –40oC to +85oC (–40oF to
+185oF).
Hysteresis: 2% of full-scale frequency, nominal.


美国德纳科Dynalco控制仪表公司简介

美国德纳科Dynalco公司设计和制造高度工程坚固，可靠的，第三方的监测，控制和往复式发动机，蒸汽涡轮机，燃气涡轮机，泵和输送系统的保护认证仪表。我们为一个在石油和天然气，化工/过程，建筑业及越野设备，交通运输，发电，船舶，采矿，水和废水市场的客户和工厂自动化等。Dynalco designs and manufactures highly engineered rugged, reliable, 3rd party certified instumentation for monitoring, control and protection of reciprocating engines, steam turbines, gas turbines, pumps and conveying systems. We serve a variety of customers in the Oil and Gas, Chemical/Process, Contruction and off-road equipment, Transportation, Power Generation, Marine, Mining, Water and Waste Water and Factory Automation Markets. 

Dynalco 1968年创立，有三种产品，以及为石油和天然气工业生产工程解决方案的目标。自那以后的47年里，Dynalco已经成为世界范围内的工业领袖，因其在石油和天然气、化学、电力、海洋和建筑行业使用的高质量的仪器和控制而得到认可。Dynalco was started in 1968, with three products and a goal of producing engineered solutions for the oil and gas industries. In the 47 years since, Dynalco has become a worldwide industry leader, recognized for its high-quality instruments and controls used in the oil & gas, chemical, power, marine and construction industries.

 

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