INNO glasvezel temperatuursensoren ,temperatuurbewakingssystemen.
How the YZF3-200 Oil Level Gauge Works
When the oil temperature changes or other factors cause the oil surface inside the conservator tank to rise or fall, the float ball connected to the swing arm follows the oil level movement. This mechanical motion is transmitted through a precision gear train and a magnetic coupling mechanism to the pointer shaft, which rotates the pointer on the 200 mm dial to indicate the current oil level.
If the oil surface reaches the preset high or low alarm position, a magnet actuates a reed contact switch (or micro switch) to send an electrical alarm signal. When the optional analog output module is configured, the measuring circuit converts the oil level position into a 4–20 mA standard current signal for remote monitoring via SCADA or a digital display controller.
Analog Output Formula
The pointer travels through a 270° arc from scale position 0 (4 mA) to scale position 10 (20 mA). The output at any pointer angle is calculated as:
Uitvoer (mA) = [(20 − 4) / 270°] × pointer angle + 4
Bijvoorbeeld, when the pointer is at scale position 1 (27°), the output is approximately 5.60 mA; at 150°, the output is approximately 12.89 mA.
Product Model Designation
The model code YZF3-200 indicates a pointer-type (Y), float-ball (F) oil level gauge with design series 3, and a dial diameter of 200 mm. The suffix “M” denotes 4–20 mA analog output capability, “R” indicates the remote transmission function, “E” refers to the climate adaptation variant, and additional suffixes may apply to custom configurations.
Structural Components
The YZF3-200MRTH oil level gauge consists of seven key components: the gauge head (housing and dial), pointer, junction box, montage flens, swing arm, float ball, and wiring terminals. Each component is manufactured to ensure long-term durability and precision under demanding transformer operating conditions.
Technische specificaties
| Parameter | Specificatie |
|---|---|
| Diameter wijzerplaat | 200 mm |
| Pointer Angle Range | 270° |
| Alarm Accuracy | Minder dan 2.5% of full scale |
| Contactcapaciteit | Wisselstroom 220V, 1A / Gelijkstroom 220V, 0.3A |
| Analoge uitgang | 4–20 mA (optioneel) |
| Bedrijfstemperatuur | −25°C to +40°C |
| Relatieve vochtigheid | ≤ 90% (at 20°C) |
| Diëlektrische weerstand | 2 kV, 1 min |
| Seal Pressure Test | 300 kPa, 20 min, no leakage |
| Bescherming tegen binnendringing | IP55 |
| Voedingsspanning (zender) | ≤ 35V DC (24V DC recommended) |
| Flange Outer Diameter (D0) | O 156 mm |
| Bolt Circle Diameter (D) | O 127 mm |
| Mounting Holes | 6 × M10 |
| Flange Opening | O 100 mm |
| Swing Arm Angle | 45° |
| Mounting Position | Lower side wall of conservator |
Swing Arm Length Selection
The swing arm length (L) is determined by the conservator tank diameter (D) using the following formula for the YZF3-200 series:
L = 1.414 × (D − 200)
All flange dimensions and swing arm lengths can be customized to match specific conservator tank configurations. Contact the engineering team for assistance with sizing.
Installatie- en onderhoudsrichtlijnen
Vóór installatie, connect the float ball to the swing arm and perform the following pre-checks: verify that the pointer moves freely without looseness; confirm that the pointer enters the red alarm zone at both the lowest and highest positions; inspect the dial glass and float ball for damage; and ensure all mechanical connections are secure.
Tijdens de installatie, insert the float ball assembly into the conservator tank first, then secure the oil level gauge to the mounting flange with bolts. The mounting flange is user-supplied. When transporting the transformer with the gauge installed, the float ball assembly should be secured or preferably installed on site.
Dit instrument is een precisieapparaat en mag niet zonder reden worden gedemonteerd. Vermijd sterke schokken op het transmissiemechanisme, niet installeren op locaties die onderhevig zijn aan hevige trillingen, en zorg ervoor dat het bewaakte vloeistofoppervlak niet onderhevig is aan hevige schommelingen. De ingangsspanning van de zender mag niet hoger zijn dan 35V DC om schade te voorkomen; een 24V DC-voeding met 2500 Ω belastingsweerstand wordt aanbevolen.
Veelgestelde vragen
Wat is een oliepeilmeter op een transformator?
Een oliepeilmeter is een controle-instrument dat op de conservator is geïnstalleerd (uitbreiding) tank van een met olie gevulde stroomtransformator. Het volgt de stijging en daling van de isolerende olie in de tank, die verandert met de belasting en de omgevingstemperatuur. Nauwkeurige oliepeilindicatie helpt operators abnormale omstandigheden zoals olielekken op te sporen, oververhitting, or seal failures before they escalate into costly transformer faults.
What is the difference between a pointer-type and a magnetic oil level indicator?
A pointer-type oil level indicator, such as the YZF3-200, uses a float ball and gear mechanism coupled magnetically to a dial pointer. It provides a continuous angular reading of the oil level. A magnetic oil level indicator typically uses a magnetic float inside a tube with external magnetic flags or a magnetic follower to display the level. Both types offer reliable non-contact level transmission through the tank wall via magnetic coupling, but the pointer-type gauge is more common in traditional transformer conservator applications due to its straightforward dial readout and well-established alarm contact integration.
What does the 4–20mA output on an oil level gauge mean?
The 4–20 mA output is an industry-standard analog current signal used for remote monitoring. In the YZF3-200MRTH, 4 mA corresponds to the lowest oil level (scale 0) En 20 mA corresponds to the highest oil level (scale 10). This signal can be transmitted over long distances to a SCADA system, PLC, or digital display unit, allowing operators to monitor the transformer oil level remotely in real time without visiting the equipment site.
Why is the oil level in a transformer conservator important?
The oil level in a transformer conservator directly reflects the health of the insulation and cooling system. Als het oliepeil te laag wordt, windings may be exposed to air, wat leidt tot verslechtering van de isolatie, gedeeltelijke ontlading, of oververhitting. An excessively high oil level may indicate internal gas generation or thermal faults. Continuous monitoring with a reliable oil level gauge ensures early detection of these issues and helps maintain safe, uninterrupted transformer operation.
Can the YZF3-200 oil level gauge be customized for different conservator sizes?
Ja. The mounting flange dimensions and swing arm length of the YZF3-200 series can be customized to suit different conservator tank diameters. The swing arm length is calculated based on the tank diameter using the formula L = 1.414 × (D − 200). Additional options include alarm contact configurations, analog output modules, and climate adaptation variants to match specific project requirements.
